301 Area Code
Maryland, US
Area code 301 is associated with Maryland, US.
Use the search box below to find owner details for any specific phone number.
Active Exchanges in the 301 Area Code | |||
|---|---|---|---|
| NXX | Region | Type | Company |
| 301-200-XXXX | Indian Head, MD | Landline | BANDWIDTH.COM CLEC, LLC - MD |
| 301-202-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-203-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-204-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-205-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-206-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-207-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-208-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-209-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-210-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-212-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-213-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-214-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-215-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-216-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-217-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-218-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-219-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-220-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-221-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-222-XXXX | Washington Zone 2, MD | Landline | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
| 301-223-XXXX | Williamsport, MD | Landline | VERIZON MARYLAND, INC. |
| 301-224-XXXX | Washington Zone 2, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-225-XXXX | Washington Zone 14, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-226-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-227-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-228-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-229-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-230-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-231-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-232-XXXX | Ashton, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-233-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-234-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-235-XXXX | Washington Zone 16, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-236-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-237-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-238-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-239-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-240-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-241-XXXX | Highfield, MD | Landline | VERIZON MARYLAND, INC. |
| 301-242-XXXX | Brandywine, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-243-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-244-XXXX | Washington Zone 3, MD | Landline | TELCOVE OPERATIONS, INC. - MD |
| 301-245-XXXX | Bittinger, MD | Landline | VERIZON MARYLAND, INC. |
| 301-246-XXXX | Nanjemoy, MD | Landline | VERIZON MARYLAND, INC. |
| 301-247-XXXX | Leonardtown, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-248-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-249-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-250-XXXX | Gaithersburg, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-251-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-252-XXXX | Gaithersburg, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-253-XXXX | Damascus, MD | Landline | VERIZON MARYLAND, INC. |
| 301-254-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-255-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-256-XXXX | Laurel, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-257-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-258-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-259-XXXX | Tompkinsville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-260-XXXX | Ashton, MD | Landline | VERIZON MARYLAND, INC. |
| 301-261-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-262-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-263-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-264-XXXX | Mount Savage, MD | Landline | VERIZON MARYLAND, INC. |
| 301-265-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-266-XXXX | Waldorf, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-267-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-268-XXXX | Cumberland, MD | Cellphone | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD |
| 301-269-XXXX | Washington Zone 2, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-270-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-271-XXXX | Thurmont, MD | Landline | VERIZON MARYLAND, INC. |
| 301-272-XXXX | Washington Zone 2, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-273-XXXX | Washington Zone 3, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-274-XXXX | Hughesville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-275-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-276-XXXX | Washington Zone 4, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-277-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-278-XXXX | Washington Zone 5, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-279-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-280-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-281-XXXX | Washington Zone 6, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-282-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-283-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-284-XXXX | Washington Zone 10, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-285-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-286-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-287-XXXX | Washington Zone 11, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-288-XXXX | Washington Zone 12, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-289-XXXX | Washington Zone 13, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-290-XXXX | Mechanicsville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-291-XXXX | Washington Zone 14, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-292-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-293-XXXX | Myersville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-294-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-295-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-296-XXXX | Washington Zone 10, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-297-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-298-XXXX | Washington Zone 15, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-299-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-300-XXXX | Washington Zone 2, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-302-XXXX | Hagerstown, MD | Cellphone | SPRINT SPECTRUM L.P. - MD |
| 301-303-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-304-XXXX | Walkersville, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-305-XXXX | Frederick, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-306-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-307-XXXX | Washington Zone 13 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-308-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-309-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-310-XXXX | Laurel (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-312-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-313-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-314-XXXX | Washington Zone 4, MD | Landline | PAETEC COMMUNICATIONS, INC. - MD |
| 301-315-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-316-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-317-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-318-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-319-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-320-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-321-XXXX | Washington Zone 11, MD | Landline | TELCOVE OPERATIONS, INC. - MD |
| 301-322-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-323-XXXX | Laurel, MD | Landline | LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
| 301-324-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-325-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-326-XXXX | Washington Zone 3, MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-327-XXXX | Washington Zone 15 (Baltimore LATA), MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-328-XXXX | Washington Zone 3, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-329-XXXX | Ashton (Baltimore LATA), MD | Landline | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
| 301-330-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-331-XXXX | Hagerstown, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-332-XXXX | Washington Zone 3, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-333-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-334-XXXX | Oakland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-335-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-336-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-337-XXXX | Gaithersburg, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-338-XXXX | Cumberland, MD | Landline | IDT AMERICA CORP - MD |
| 301-339-XXXX | Washington Zone 10, MD | Landline | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
| 301-340-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-341-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-342-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-343-XXXX | Washington Zone 5, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-344-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-345-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-346-XXXX | Washington Zone 3, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-347-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-348-XXXX | Washington Zone 11, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-349-XXXX | Poolesville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-350-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-351-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-352-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-353-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-354-XXXX | Washington Zone 10, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-355-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-356-XXXX | Laurel, MD | Landline | VDL, INC. DBA GLOBAL TELECOM BROKERS - MD |
| 301-357-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-358-XXXX | Washington Zone 15, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-359-XXXX | Westernport, MD | Landline | VERIZON MARYLAND, INC. |
| 301-360-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-361-XXXX | Washington Zone 4, MD | Landline | LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
| 301-362-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-363-XXXX | Damascus (Hagerstown LATA), MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-364-XXXX | Washington Zone 4, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-365-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-366-XXXX | Gaithersburg, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-367-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-368-XXXX | Damascus, MD | Landline | VERIZON MARYLAND, INC. |
| 301-369-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-370-XXXX | Gaithersburg, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-371-XXXX | Middletown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-372-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-373-XXXX | Leonardtown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-374-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-375-XXXX | Indian Head, MD | Landline | VERIZON MARYLAND, INC. |
| 301-376-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-377-XXXX | Laurel, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-378-XXXX | Frederick, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-379-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-380-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-382-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-383-XXXX | Washington Zone 14, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-384-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-385-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-386-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-387-XXXX | Oakland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-388-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-389-XXXX | Washington Zone 13, MD | Landline | LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
| 301-390-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-391-XXXX | Damascus, MD | Landline | VERIZON MARYLAND, INC. |
| 301-392-XXXX | La Plata, MD | Landline | VERIZON MARYLAND, INC. |
| 301-393-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-394-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-395-XXXX | Laurel (Baltimore LATA), MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-396-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-397-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-398-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-399-XXXX | Waldorf, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-400-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-401-XXXX | Frederick, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-402-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-403-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-404-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-405-XXXX | Washington Zone 4, MD | Landline | PAETEC COMMUNICATIONS, INC. - MD |
| 301-406-XXXX | Washington Zone 2, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-407-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-408-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-409-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-412-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-413-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-414-XXXX | Damascus, MD | Landline | VERIZON MARYLAND, INC. |
| 301-415-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-416-XXXX | Myersville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-417-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-418-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-419-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-420-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-421-XXXX | Ashton, MD | Landline | VERIZON MARYLAND, INC. |
| 301-422-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-423-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-424-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-425-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-426-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-427-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-428-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-429-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-430-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-431-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-432-XXXX | Keedysville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-433-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-434-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-435-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-436-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-437-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-438-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-439-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-440-XXXX | Washington Zone 5, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-441-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-442-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-443-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-444-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-445-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-446-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-447-XXXX | Emmitsburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-448-XXXX | Washington Zone 3, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-449-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-451-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-452-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-453-XXXX | Kitzmiller, MD | Landline | VERIZON MARYLAND, INC. |
| 301-454-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-455-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-456-XXXX | Washington Zone 5, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-457-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-458-XXXX | Washington Zone 4, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-459-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-460-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-461-XXXX | Washington Zone 10, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-462-XXXX | Myersville, MD | Cellphone | SPRINT SPECTRUM L.P. - MD |
| 301-463-XXXX | Lonaconing, MD | Landline | VERIZON MARYLAND, INC. |
| 301-464-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-465-XXXX | Myersville, MD | Cellphone | SPRINT SPECTRUM L.P. - MD |
| 301-466-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-467-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-468-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-469-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-470-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-471-XXXX | Frederick, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-472-XXXX | Mechanicsville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-473-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-474-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-475-XXXX | Leonardtown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-476-XXXX | Ashton, MD | Landline | VERIZON MARYLAND, INC. |
| 301-477-XXXX | Washington Zone 13, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-478-XXXX | Flintstone, MD | Landline | VERIZON MARYLAND, INC. |
| 301-479-XXXX | Washington Zone 13, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-480-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-481-XXXX | Leonardtown, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-482-XXXX | Damascus, MD | Landline | VERIZON MARYLAND, INC. |
| 301-483-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-484-XXXX | Washington Zone 4, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-485-XXXX | Washington Zone 6, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-486-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-487-XXXX | Myersville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-488-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-489-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-490-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-491-XXXX | Hagerstown, MD | Cellphone | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD |
| 301-492-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-493-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-494-XXXX | Washington Zone 15 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-495-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-496-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-497-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-498-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-499-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-500-XXXX | Washington Zone 2, MD | Landline | XO MARYLAND, LLC |
| 301-501-XXXX | Oakland, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-502-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-503-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-504-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-505-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-506-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-507-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-508-XXXX | Myersville, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-509-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-510-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-512-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-513-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-514-XXXX | Frederick, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-515-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-516-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-517-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-518-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-519-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-520-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-521-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-522-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-523-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-524-XXXX | Frederick, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-525-XXXX | Gaithersburg, MD | Landline | QUANTUM TELECOMMUNICATIONS, INC. - MD |
| 301-526-XXXX | Washington Zone 3, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-527-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-528-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-529-XXXX | Washington Zone 10, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-530-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-531-XXXX | Washington Zone 4, MD | Landline | STARPOWER COMMUNICATIONS, LLC - MD |
| 301-532-XXXX | Laurel (Baltimore LATA), MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-533-XXXX | Oakland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-534-XXXX | Indian Head, MD | Landline | YMAX COMMUNICATIONS CORP. - MD |
| 301-535-XXXX | Waldorf, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-536-XXXX | Leonardtown, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-537-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-538-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-539-XXXX | La Plata, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-540-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-541-XXXX | Washington Zone 5, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-542-XXXX | Waldorf, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-543-XXXX | Laurel, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-544-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-545-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-546-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-547-XXXX | Washington Zone 2, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-548-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-549-XXXX | Ashton, MD | Landline | VERIZON MARYLAND, INC. |
| 301-551-XXXX | Washington Zone 3, MD | Landline | BALTIMORE-WASHINGTON TELEPHONE (BWT) |
| 301-552-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-553-XXXX | Waldorf, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-554-XXXX | Washington Zone 2, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-556-XXXX | Gaithersburg, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-557-XXXX | Washington Zone 3, MD | Landline | BROADWING COMMUNICATIONS. LLC - MD |
| 301-558-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-559-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-560-XXXX | Washington Zone 4, MD | Landline | PAETEC COMMUNICATIONS, INC. - MD |
| 301-561-XXXX | Washington Zone 3, MD | Landline | BALTIMORE-WASHINGTON TELEPHONE (BWT) |
| 301-562-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-563-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-564-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-565-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-566-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-567-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-568-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-569-XXXX | Gaithersburg, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-570-XXXX | Ashton, MD | Landline | VERIZON MARYLAND, INC. |
| 301-571-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-572-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-573-XXXX | Hagerstown, MD | Cellphone | SPRINT SPECTRUM L.P. - MD |
| 301-574-XXXX | Washington Zone 15, MD | Landline | VERIZON MARYLAND, INC. |
| 301-575-XXXX | Laurel, MD | Landline | US LEC OF MARYLAND, INC. |
| 301-576-XXXX | Washington Zone 3, MD | Landline | PAETEC COMMUNICATIONS, INC. - MD |
| 301-577-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-578-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-579-XXXX | Brandywine, MD | Landline | VERIZON MARYLAND, INC. |
| 301-580-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-581-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-582-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-583-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-584-XXXX | Washington Zone 12, MD | Landline | BALTIMORE-WASHINGTON TELEPHONE (BWT) |
| 301-585-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-586-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-587-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-588-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-589-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-590-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-591-XXXX | Gaithersburg, MD | Landline | PAETEC COMMUNICATIONS, INC. - MD |
| 301-592-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-593-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-594-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-595-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-596-XXXX | Laurel (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-597-XXXX | Hancock, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-598-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-599-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-600-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-601-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-602-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-603-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-604-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-605-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-606-XXXX | Frederick, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-607-XXXX | Damascus (Hagerstown LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-608-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-609-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-610-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-612-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - MD |
| 301-613-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-614-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-615-XXXX | Washington Zone 13, MD | Landline | BANDWIDTH.COM CLEC, LLC - MD |
| 301-616-XXXX | Oakland, MD | Cellphone | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD |
| 301-617-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-618-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-619-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-620-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-621-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-622-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-623-XXXX | Washington Zone 13, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-624-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-625-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-626-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-627-XXXX | Washington Zone 15, MD | Landline | VERIZON MARYLAND, INC. |
| 301-628-XXXX | Washington Zone 3, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-629-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-630-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-631-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-632-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-633-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-634-XXXX | Washington Zone 2, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-635-XXXX | Myersville, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-636-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-637-XXXX | Washington Zone 10, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-638-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-639-XXXX | Frederick, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-640-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-641-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-642-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-643-XXXX | Waldorf, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-644-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-645-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-646-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-647-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-648-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-649-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-650-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-651-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-652-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-653-XXXX | Waldorf, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-654-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-655-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-656-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-657-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-658-XXXX | Ashton, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-659-XXXX | Waldorf, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-660-XXXX | Keedysville, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-661-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-662-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-663-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-664-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-665-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-666-XXXX | Washington Zone 14, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-667-XXXX | Myersville, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-668-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-669-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-670-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-671-XXXX | Hagerstown, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-672-XXXX | Lexington Park-Great Mills, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-673-XXXX | Frederick, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-674-XXXX | Washington Zone 2, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-675-XXXX | Washington Zone 3, MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-676-XXXX | Frederick, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-677-XXXX | Washington Zone 14, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-678-XXXX | Hancock, MD | Landline | VERIZON MARYLAND, INC. |
| 301-679-XXXX | Washington Zone 12, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-680-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-681-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-682-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-683-XXXX | Washington Zone 4, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-684-XXXX | Indian Head, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-685-XXXX | Damascus, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-686-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-687-XXXX | Frostburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-688-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-689-XXXX | Frostburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-690-XXXX | Leonardtown, MD | Landline | IDT AMERICA CORP - MD |
| 301-691-XXXX | Poolesville, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-692-XXXX | Washington Zone 11, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-693-XXXX | Frederick, MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-694-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-695-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-696-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-697-XXXX | Cumberland, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-698-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-699-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-701-XXXX | Washington Zone 13, MD | Landline | BANDWIDTH.COM CLEC, LLC - MD |
| 301-702-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-703-XXXX | Mount Airy, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-704-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-705-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-706-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-707-XXXX | Cumberland, MD | Cellphone | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD |
| 301-708-XXXX | Laurel (Baltimore LATA), MD | Landline | CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD |
| 301-709-XXXX | Washington Zone 13, MD | Cellphone | USA MOBILITY WIRELESS, INC. |
| 301-710-XXXX | Waldorf, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-712-XXXX | Frederick, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-713-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-714-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-715-XXXX | Washington Zone 15, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-716-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-717-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-718-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-719-XXXX | Washington Zone 16, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-720-XXXX | Brandywine, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-721-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-722-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-723-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-724-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-725-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-727-XXXX | Washington Zone 5, MD | Landline | BALTIMORE-WASHINGTON TELEPHONE (BWT) |
| 301-728-XXXX | Washington Zone 3, MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-729-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-730-XXXX | Myersville, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-731-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-732-XXXX | Frederick, MD | Cellphone | METRO PCS, INC. |
| 301-733-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-734-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-735-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-736-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-737-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-738-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-739-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-740-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-741-XXXX | Laurel, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-742-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-743-XXXX | Indian Head, MD | Landline | VERIZON MARYLAND, INC. |
| 301-744-XXXX | Indian Head, MD | Landline | VERIZON MARYLAND, INC. |
| 301-745-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-746-XXXX | Friendsville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-747-XXXX | Washington Zone 6, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-748-XXXX | Frederick, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-749-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-750-XXXX | Friendsville, MD | Landline | CORE COMMUNICATIONS, INC. - MD |
| 301-751-XXXX | Waldorf, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-752-XXXX | Waldorf, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-753-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-754-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-755-XXXX | Washington Zone 3, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-756-XXXX | Washington Zone 14, MD | Landline | LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
| 301-757-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-758-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-759-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-760-XXXX | Washington Zone 2, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-761-XXXX | Washington Zone 11, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-762-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-763-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-764-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-765-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-766-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-767-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-768-XXXX | Washington Zone 3, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-769-XXXX | Leonardtown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-770-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-771-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-772-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-773-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-774-XXXX | Ashton, MD | Landline | VERIZON MARYLAND, INC. |
| 301-775-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-776-XXXX | Laurel, MD | Landline | VERIZON MARYLAND, INC. |
| 301-777-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-778-XXXX | Washington Zone 5, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-779-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-780-XXXX | Washington Zone 15, MD | Landline | VERIZON MARYLAND, INC. |
| 301-781-XXXX | Frostburg, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-782-XXXX | Brandywine, MD | Landline | VERIZON MARYLAND, INC. |
| 301-783-XXXX | Cumberland, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-784-XXXX | Cumberland, MD | Landline | VERIZON MARYLAND, INC. |
| 301-785-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-786-XXXX | McCoole, MD | Landline | VERIZON MARYLAND, INC. |
| 301-787-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-788-XXXX | Frederick, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-789-XXXX | Washington Zone 4, MD | Landline | CORE COMMUNICATIONS, INC. - PA |
| 301-790-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-791-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-792-XXXX | Washington Zone 3, MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-793-XXXX | Washington Zone 3, MD | Cellphone | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC |
| 301-794-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-795-XXXX | Washington Zone 10, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-796-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-797-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-798-XXXX | Damascus (Hagerstown LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-799-XXXX | Keedysville, MD | Landline | CORE COMMUNICATIONS, INC. - MD |
| 301-800-XXXX | Hagerstown, MD | Cellphone | VIRGINIA PCS ALLIANCE, L.C. |
| 301-801-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-802-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-803-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-804-XXXX | Ashton, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-805-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-806-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-807-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-808-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-809-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-810-XXXX | Buckeystown, MD | Landline | AT&T LOCAL |
| 301-812-XXXX | Washington Zone 15 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-813-XXXX | Washington Zone 2, MD | Landline | BALTIMORE-WASHINGTON TELEPHONE (BWT) |
| 301-814-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-815-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-816-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-817-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-818-XXXX | Waldorf, MD | Landline | BANDWIDTH.COM CLEC, LLC - MD |
| 301-819-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-820-XXXX | Gaithersburg, MD | Landline | AT&T LOCAL |
| 301-821-XXXX | Laurel, MD | Landline | AT&T LOCAL |
| 301-822-XXXX | Washington Zone 11, MD | Landline | AT&T LOCAL |
| 301-823-XXXX | Washington Zone 13, MD | Landline | AT&T LOCAL |
| 301-824-XXXX | Smithsburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-825-XXXX | Washington Zone 10, MD | Landline | AT&T LOCAL |
| 301-826-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-827-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-828-XXXX | Washington Zone 2, MD | Landline | AT&T LOCAL |
| 301-829-XXXX | Mount Airy, MD | Landline | VERIZON MARYLAND, INC. |
| 301-830-XXXX | Washington Zone 3, MD | Landline | AT&T LOCAL |
| 301-831-XXXX | Damascus (Hagerstown LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-832-XXXX | Washington Zone 4, MD | Landline | AT&T LOCAL |
| 301-833-XXXX | Washington Zone 14, MD | Landline | TELEPORT COMMUNICATIONS AMERICA, LLC - DC |
| 301-834-XXXX | Brunswick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-835-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-836-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-837-XXXX | Washington Zone 13, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-838-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-839-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-840-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-841-XXXX | Washington Zone 2, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-842-XXXX | Clear Spring, MD | Landline | VERIZON MARYLAND, INC. |
| 301-843-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-844-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-845-XXXX | Walkersville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-846-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-847-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-848-XXXX | Waldorf, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-849-XXXX | Oakland, MD | Landline | NEW FRONTIERS TELECOMMUNICATIONS, INC. |
| 301-850-XXXX | Washington Zone 14, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-851-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-852-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-853-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-854-XXXX | Ashton (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-855-XXXX | Washington Zone 15 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-856-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-857-XXXX | Clear Spring, MD | Landline | CORE COMMUNICATIONS, INC. - MD |
| 301-858-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-859-XXXX | Oakland, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-860-XXXX | Washington Zone 14, MD | Landline | VERIZON MARYLAND, INC. |
| 301-861-XXXX | Waldorf, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-862-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-863-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-864-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-865-XXXX | New Market, MD | Landline | VERIZON MARYLAND, INC. |
| 301-866-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-867-XXXX | Washington Zone 14, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-868-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-869-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-870-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-871-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-872-XXXX | Ridge, MD | Landline | VERIZON MARYLAND, INC. |
| 301-873-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-874-XXXX | Buckeystown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-875-XXXX | Laurel, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-876-XXXX | Cumberland, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-877-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-878-XXXX | Baltimore, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-879-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-880-XXXX | Lexington Park-Great Mills, MD | Landline | LEVEL 3 COMMUNICATIONS, LLC - MD |
| 301-881-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-882-XXXX | New Market, MD | Landline | CORE COMMUNICATIONS, INC. - MD |
| 301-883-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-884-XXXX | Mechanicsville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-885-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-886-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-887-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-888-XXXX | Washington Zone 16, MD | Landline | VERIZON MARYLAND, INC. |
| 301-889-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-890-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-891-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-892-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-893-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-894-XXXX | Washington Zone 6, MD | Landline | VERIZON MARYLAND, INC. |
| 301-895-XXXX | Grantsville, MD | Landline | VERIZON MARYLAND, INC. |
| 301-896-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-897-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-898-XXXX | Frederick, MD | Landline | VERIZON MARYLAND, INC. |
| 301-899-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-900-XXXX | Washington Zone 2, MD | Landline | NEUTRAL TANDEM-MARYLAND, LLC - MD |
| 301-901-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-902-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-903-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-904-XXXX | Leonardtown, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-905-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-906-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-907-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-908-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-909-XXXX | Washington Zone 5, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-910-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-912-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-913-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-914-XXXX | Oakland, MD | Landline | MOUNTAIN COMMUNICATIONS, LLC DBA PROCOM - MD |
| 301-915-XXXX | Washington Zone 2, MD | Landline | STARPOWER COMMUNICATIONS, LLC - MD |
| 301-916-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-917-XXXX | Washington Zone 10, MD | Landline | STARPOWER COMMUNICATIONS, LLC - MD |
| 301-918-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-919-XXXX | Washington Zone 2, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-920-XXXX | Washington Zone 3, MD | Landline | STARPOWER COMMUNICATIONS, LLC - MD |
| 301-921-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-922-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-923-XXXX | Washington Zone 13, MD | Landline | BANDWIDTH.COM CLEC, LLC - MD |
| 301-924-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-925-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-926-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-927-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-928-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-929-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-930-XXXX | Washington Zone 3, MD | Landline | VERIZON MARYLAND, INC. |
| 301-931-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-932-XXXX | Waldorf, MD | Landline | VERIZON MARYLAND, INC. |
| 301-933-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-934-XXXX | La Plata, MD | Landline | VERIZON MARYLAND, INC. |
| 301-935-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-936-XXXX | Hagerstown, MD | Landline | TELNYX LLC |
| 301-937-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-938-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-939-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-940-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-941-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-942-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-943-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-944-XXXX | Gaithersburg, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-945-XXXX | Washington Zone 11, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-946-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-947-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-948-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-949-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-951-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-952-XXXX | Washington Zone 15, MD | Landline | VERIZON MARYLAND, INC. |
| 301-953-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-954-XXXX | Washington Zone 4 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-955-XXXX | Washington Zone 4, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-956-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-957-XXXX | Laurel, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-960-XXXX | Washington Zone 3, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-961-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-962-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-963-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-964-XXXX | Myersville, MD | Cellphone | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 301-965-XXXX | Washington Zone 6, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-966-XXXX | Washington Zone 12, MD | Landline | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 301-967-XXXX | Washington Zone 5, MD | Landline | VERIZON MARYLAND, INC. |
| 301-968-XXXX | Washington Zone 2, MD | Landline | MCI WORLDCOM COMMUNICATIONS, INC. - MD |
| 301-969-XXXX | Brunswick, MD | Landline | COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD |
| 301-970-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | VERIZON MARYLAND, INC. |
| 301-971-XXXX | Washington Zone 6, MD | Landline | STARPOWER COMMUNICATIONS, LLC - MD |
| 301-972-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-973-XXXX | Washington Zone 14 (Baltimore LATA), MD | Landline | BANDWIDTH.COM CLEC, LLC - MD |
| 301-974-XXXX | Laurel, MD | Landline | STARPOWER COMMUNICATIONS, LLC - MD |
| 301-975-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-976-XXXX | Washington Zone 5, MD | Landline | BALTIMORE-WASHINGTON TELEPHONE (BWT) |
| 301-977-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-978-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-979-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-980-XXXX | Washington Zone 3, MD | Cellphone | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD |
| 301-981-XXXX | Washington Zone 5, MD | Landline | LEVEL 3 TELECOM OF MARYLAND, LLC - MD |
| 301-982-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-983-XXXX | Washington Zone 10, MD | Landline | VERIZON MARYLAND, INC. |
| 301-984-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-985-XXXX | Washington Zone 4, MD | Landline | VERIZON MARYLAND, INC. |
| 301-986-XXXX | Washington Zone 2, MD | Landline | VERIZON MARYLAND, INC. |
| 301-987-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-988-XXXX | Hagerstown, MD | Cellphone | USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD |
| 301-989-XXXX | Washington Zone 12, MD | Landline | VERIZON MARYLAND, INC. |
| 301-990-XXXX | Gaithersburg, MD | Landline | VERIZON MARYLAND, INC. |
| 301-991-XXXX | Hagerstown, MD | Cellphone | SPRINT SPECTRUM L.P. - MD |
| 301-992-XXXX | Hagerstown, MD | Cellphone | SPRINT SPECTRUM L.P. - MD |
| 301-993-XXXX | Washington Zone 13, MD | Landline | VERIZON MARYLAND, INC. |
| 301-994-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-995-XXXX | Lexington Park-Great Mills, MD | Landline | VERIZON MARYLAND, INC. |
| 301-996-XXXX | Washington Zone 3, MD | Cellphone | SPRINT SPECTRUM L.P. |
| 301-997-XXXX | Leonardtown, MD | Landline | VERIZON MARYLAND, INC. |
| 301-998-XXXX | Washington Zone 11, MD | Landline | VERIZON MARYLAND, INC. |
| 301-999-XXXX | Hagerstown, MD | Landline | VERIZON MARYLAND, INC. |