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Area Codes > 240 > Central Office Codes

Exchange Rate Center State Operating Company
240-308 DAMASCS236 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-310 HAGERSTOWN MD USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD
240-311 MD
240-312 WSHNGTNZN5 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-313 HAGERSTOWN MD VERIZON MARYLAND, INC.
240-314 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-315 FREDERICK MD VERIZON MARYLAND, INC.
240-317 LXTNPKGRML MD STARPOWER COMMUNICATIONS, LLC - MD
240-318 WSNGTNZN16 MD VERIZON MARYLAND, INC.
240-319 LAUREL238 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-320 WALDORF MD CAVALIER EAST LLC - MD
240-321 OAKLAND MD USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD
240-322 MCCOOLE MD CORE COMMUNICATIONS, INC. - MD
240-323 EMMITSBURG MD CORE COMMUNICATIONS, INC. - MD
240-325 DAMASCS236 MD CORE COMMUNICATIONS, INC. - MD
240-326 WSNG236Z15 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-327 GAITHERSBG MD CORE COMMUNICATIONS, INC. - MD
240-328 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-329 HAGERSTOWN MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-330 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-331 WSHNGTNZN3 MD GLOBAL NAPS SOUTH, INC. - MD
240-332 TOMPKINSVL MD GLOBAL NAPS SOUTH, INC. - MD
240-333 WSHNGTNZN2 MD CAVALIER EAST LLC - MD
240-334 WSNG236Z14 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-335 WSNG236Z14 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-336 WSHNGTNZN2 MD CORE COMMUNICATIONS, INC. - MD
240-337 WSHNGTNZN5 MD GLOBAL NAPS SOUTH, INC. - MD
240-338 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-339 WSNG236Z15 MD CAVALIER EAST LLC - MD
240-342 ASHTON236 MD STARPOWER COMMUNICATIONS, LLC - MD
240-344 FREDERICK MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-345 ASHTON238 MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-346 WALDORF MD SPRINT SPECTRUM L.P.
240-348 WSNGTNZN16 MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-349 LA PLATA MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-350 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-351 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-352 LA PLATA MD GLOBAL NAPS SOUTH, INC. - MD
240-353 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-354 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-355 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-356 MYERSVILLE MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-357 FREDERICK MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-358 DAMASCS236 MD GLOBAL NAPS SOUTH, INC. - MD
240-359 INDIANHEAD MD GLOBAL NAPS SOUTH, INC. - MD
240-361 GAITHERSBG MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-362 CUMBERLAND MD VERIZON MARYLAND, INC.
240-363 WSNGTNZN11 MD GLOBAL NAPS SOUTH, INC. - MD
240-364 GAITHERSBG MD CAVALIER EAST LLC - MD
240-365 DAMASCS236 MD BALTIMORE-WASHINGTON TELEPHONE BWT
240-366 WILLIAMSPT MD AT&T LOCAL
240-367 FREDERICK MD NEXTEL COMMUNICATIONS, INC.
240-368 WALDORF MD GLOBAL NAPS SOUTH, INC. - MD
240-369 MOUNT AIRY MD CORE COMMUNICATIONS, INC. - MD
240-370 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-371 WSNGTNZN12 MD GLOBAL NAPS SOUTH, INC. - MD
240-372 GAITHERSBG MD NEXTEL COMMUNICATIONS, INC.
240-373 WSNG236Z13 MD VERIZON MARYLAND, INC.
240-374 LAUREL236 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-375 WSHNGTNZN5 MD NEXTEL COMMUNICATIONS, INC.
240-376 HUGHESVL MD GLOBAL NAPS SOUTH, INC. - MD
240-377 INDIANHEAD MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-378 CUMBERLAND MD CORE COMMUNICATIONS, INC. - MD
240-379 FREDERICK MD VERIZON MARYLAND, INC.
240-380 WSHNGTNZN2 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-381 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-383 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-384 LXTNPKGRML MD GLOBAL NAPS SOUTH, INC. - MD
240-385 MYERSVILLE MD VERIZON MARYLAND, INC.
240-386 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-387 WSNG236Z13 MD CAVALIER EAST LLC - MD
240-388 GAITHERSBG MD NEXTEL COMMUNICATIONS, INC.
240-389 ASHTON236 MD ATX TELECOMMUNICATIONS SERVICES, LTD
240-390 ASHTON236 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-391 WSNG236Z13 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-392 WSHNGTNZN5 MD STARPOWER COMMUNICATIONS, LLC - MD
240-393 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-394 MOUNT AIRY MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-395 WSHNGTNZN2 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-396 WSHNGTNZN2 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-398 WSHNGTNZN3 MD NEXTEL COMMUNICATIONS, INC.
240-399 WSNGTNZN10 MD XO MARYLAND, LLC
240-401 WSNGTNZN10 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-403 WSNGTNZN10 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-404 GAITHERSBG MD XO MARYLAND, LLC
240-405 FREDERICK MD US LEC OF MARYLAND, INC.
240-407 WSNGTNZN16 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-409 FREDERICK MD DOBSON CELLULAR SYSTEMS, INC.
240-410 MD
240-411 MD
240-412 WALDORF MD SPRINT SPECTRUM L.P.
240-413 WSHNGTNZN4 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-414 WSHNGTNZN6 MD GLOBAL NAPS SOUTH, INC. - MD
240-416 WALDORF MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-417 WSHNGTNZN5 MD NEXTEL COMMUNICATIONS, INC.
240-418 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-419 WALDORF MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-420 HAGERSTOWN MD VERIZON MARYLAND, INC.
240-421 WSNGTNZN10 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-422 FREDERICK MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC