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Enter 7-digit phone number for area code 240 or the complete 10-digit phone number

Phone Prefixes for Area Code 240

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Area code location Company / Service Provider
240-713 LAUREL, MD PEERLESS NETWORK OF MARYLAND, LLC
240-714 WSHNGTNZN4, MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-715 Washington, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-716 Washington, MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-718 Lexington Park, MD XO MARYLAND, LLC
240-719 Washington, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-720 Gaithersburg, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-722 Ashton, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-723 Washington, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-724 Washington, MD CAVALIER EAST LLC - MD
240-725 Lexington Park, MD VERIZON MARYLAND, INC.
240-727 CUMBERLAND, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-731 Washington, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-732 MOUNT AIRY, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-734 SMITHSBURG, MD BANDWIDTH.COM CLEC, LLC - MD
240-737 WSHNGTNZN4, MD CAVALIER EAST LLC - MD
240-740 Washington, MD ATLANTECH ONLINE, INC. - MD
240-743 Washington, MD LOCAL ACCESS LLC - MD
240-744 Washington, MD BROADWING COMMUNICATIONS. LLC - MD
240-745 Damascus, MD XO MARYLAND, LLC
240-747 Washington County, MD CAVALIER EAST LLC - MD
240-750 Gaithersburg, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-751 Gaithersburg, MD TELCOVE OPERATIONS, INC. - MD
240-752 Washington, MD TELCOVE OPERATIONS, INC. - MD
240-753 Washington, MD TELCOVE OPERATIONS, INC. - MD
240-754 WALDORF, MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-755 LAUREL, MD COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD
240-757 WSNG236Z13, MD PEERLESS NETWORK OF MARYLAND, LLC
240-758 LAUREL, MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-760 Washington, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-762 Washington, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-763 Washington, MD BANDWIDTH.COM CLEC, LLC - MD
240-764 WSHNGTNZN4, MD XO MARYLAND, LLC
240-765 Washington, MD XO MARYLAND, LLC
240-766 Washington, MD XO MARYLAND, LLC
240-767 Washington, MD CAVALIER EAST LLC - MD
240-770 WSHNGTNZN4, MD COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD
240-771 Poolesville, MD NEUTRAL TANDEM-MARYLAND, LLC - MD
240-772 FREDERICK, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-773 Washington, MD VERIZON MARYLAND, INC.
240-774 LONACONING, MD BANDWIDTH.COM CLEC, LLC - MD
240-775 Westernport, MD BANDWIDTH.COM CLEC, LLC - MD
240-776 LA PLATA, MD BROADWING COMMUNICATIONS. LLC - MD
240-777 Washington, MD VERIZON MARYLAND, INC.
240-778 Washington, MD XO MARYLAND, LLC
240-779 Ashton, MD CAVALIER EAST LLC - MD
240-780 Gaithersburg, MD BROADWING COMMUNICATIONS. LLC - MD
240-781 Washington, MD MCIMETRO ACCESS TRANSMISSION SERVICES LLC
240-782 Damascus, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-783 Washington, MD MTE, INC. DBA MTE PAGING NETWORK
New numbers being added to 240 area code
Effective: 06/17/2017
240-267 in HAGERSTOWN, MD
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
Effective: 08/10/2017
240-484 in LAUREL, MD
NEW CINGULAR WIRELESS PCS, LLC - DC
Effective: 08/11/2017
240-867 in WASHINGTON, MD
COMMIO, LLC
240 Area Code Information
Type of code: General Purpose Code
location: MD - US
Time zone: E
Assigned for use: Yes
Code in service: Yes
Service date: June 01, 1997
In jeopardy: No
Relief in progress: No
NPA Relief status:
Code assignable: Yes
Geographic or
non-geographic:
G
Reserved for future use: No
Planning letter(s): IL96/07-004 IL96/06-009
Overlay code: Yes
Overlay complex: 227/240/301
Dialing plan Standard Permissive
Home local calls: 10D 1+10D
Foreign local calls: 10D 1+10D
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -
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