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Area Codes > 240 > Central Office Codes

Exchange Rate Center State Operating Company
240-423 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-424 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-425 WSHNGTNZN2 MD DSLNET COMMUNICATIONS VA, INC. - MD
240-426 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-427 WALDORF MD XO MARYLAND, LLC
240-429 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-430 WSNGTNZN11 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-431 LXTNPKGRML MD SPRINT SPECTRUM L.P.
240-432 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-433 WSNGTNZN12 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-434 LEONARDTN MD BROADWING COMMUNICATIONS. LLC - MD
240-436 BUCKEYSTN MD TELCOVE OPERATIONS, INC. - MD
240-437 ASHTON236 MD XO MARYLAND, LLC
240-439 FREDERICK MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-441 WSHNGTNZN6 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-442 OAKLAND MD VERIZON MARYLAND, INC.
240-443 MD
240-446 FREDERICK MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-447 WSNGTNZN10 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-449 GAITHERSBG MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-450 WSHNGTNZN3 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-453 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-454 GAITHERSBG MD PAETEC COMMUNICATIONS, INC. - MD
240-455 WSHNGTNZN5 MD PAETEC COMMUNICATIONS, INC. - DC
240-456 LAUREL236 MD VERIZON MARYLAND, INC.
240-460 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-461 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-462 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-463 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-464 WSHNGTNZN2 MD NEXTEL COMMUNICATIONS, INC.
240-465 WSHNGTNZN2 MD GLOBAL NAPS SOUTH, INC. - MD
240-466 MECHANCSVL MD GLOBAL NAPS SOUTH, INC. - MD
240-468 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-469 HAGERSTOWN MD SPRINT SPECTRUM L.P. - MD
240-471 WSNGTNZN12 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-472 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-473 WSNG236Z13 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-475 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-476 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-477 GAITHERSBG MD LIGHTWAVE COMMUNICATIONS, LLC - MD
240-478 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-479 WSHNGTNZN2 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-481 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-482 WSHNGTNZN2 MD US LEC OF MARYLAND, INC.
240-483 WSHNGTNZN2 MD COMCAST BUSINESS COMMUNICATIONS, INC. - MD
240-485 WSHNGTNZN3 MD US LEC OF MARYLAND, INC.
240-486 WSNG236Z14 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-487 WSHNGTNZN4 MD US LEC OF MARYLAND, INC.
240-489 POOLESVL MD XO MARYLAND, LLC
240-490 MIDDLETOWN MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-491 WSHNGTNZN3 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-492 WSHNGTNZN5 MD US LEC OF MARYLAND, INC.
240-493 WSHNGTNZN6 MD US LEC OF MARYLAND, INC.
240-494 WSHNGTNZN3 MD CAVALIER EAST LLC - MD
240-497 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
240-498 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-499 WSNGTNZN10 MD US LEC OF MARYLAND, INC.
240-501 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-505 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-506 WSNGTNZN10 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-508 WSHNGTNZN5 MD NEXTEL COMMUNICATIONS, INC.
240-509 WSNG238Z14 MD AT&T LOCAL
240-510 WSNG236Z15 MD XO MARYLAND, LLC
240-511 MD
240-512 WSNG238Z13 MD CORE COMMUNICATIONS, INC. - MD
240-514 WSNGTNZN11 MD US LEC OF MARYLAND, INC.
240-515 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-516 WSNGTNZN12 MD US LEC OF MARYLAND, INC.
240-520 HAGERSTOWN MD SPRINT SPECTRUM L.P. - MD
240-522 CUMBERLAND MD SPRINT SPECTRUM L.P. - MD
240-523 LA PLATA MD XO MARYLAND, LLC
240-524 LAUREL236 MD GLOBAL NAPS SOUTH, INC. - MD
240-525 WSNG236Z15 MD GLOBAL NAPS SOUTH, INC. - MD
240-526 LEONARDTN MD GLOBAL NAPS SOUTH, INC. - MD
240-527 HAGERSTOWN MD VERIZON MARYLAND, INC.
240-528 HUGHESVL MD BROADWING COMMUNICATIONS. LLC - MD
240-529 FREDERICK MD VERIZON MARYLAND, INC.
240-533 WSHNGTNZN3 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
240-535 WSHNGTNZN3 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-536 ASHTON236 MD GLOBAL NAPS SOUTH, INC. - MD
240-538 LEONARDTN MD XO MARYLAND, LLC
240-539 WSHNGTNZN4 MD GLOBAL NAPS SOUTH, INC. - MD
240-542 WSNG236Z13 MD US LEC OF MARYLAND, INC.
240-543 WSHNGTNZN2 MD SPRINT SPECTRUM L.P.
240-544 WSNG236Z14 MD US LEC OF MARYLAND, INC.
240-545 WSNG236Z15 MD US LEC OF MARYLAND, INC.
240-546 WSNGTNZN16 MD US LEC OF MARYLAND, INC.
240-547 LAUREL236 MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-548 WSNG236Z14 MD ALLEGIANCE TELECOM, INC. - MD
240-553 WSNG236Z13 MD ALLEGIANCE TELECOM, INC. - MD
240-554 LAUREL236 MD ALLEGIANCE TELECOM, INC. - MD
240-555 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
240-556 WSNG236Z14 MD PAETEC COMMUNICATIONS, INC. - MD
240-558 WSNGTNZN11 MD CAVALIER TELEPHONE MID-ATLANTIC. LLC - MD
240-559 ASHTON236 MD ALLEGIANCE TELECOM, INC. - MD
240-560 WSNGTNZN12 MD XO MARYLAND, LLC
240-565 LAUREL238 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-566 FREDERICK MD VERIZON MARYLAND, INC.
240-567 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-568 LAUREL236 MD VERIZON MARYLAND, INC.