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Area Codes > 301 > Central Office Codes

Exchange Rate Center State Operating Company
301-403 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-404 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-405 WSHNGTNZN4 MD PAETEC COMMUNICATIONS, INC. - MD
301-406 WSHNGTNZN2 MD ARCH WIRELESS HOLDINGS, INC.
301-407 GAITHERSBG MD VERIZON MARYLAND, INC.
301-408 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-409 WSNG236Z13 MD ARCH WIRELESS HOLDINGS, INC.
301-410 MD
301-411 MD
301-412 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-413 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-414 DAMASCS236 MD VERIZON MARYLAND, INC.
301-415 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-416 MYERSVILLE MD VERIZON MARYLAND, INC.
301-417 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-418 FREDERICK MD VERIZON MARYLAND, INC.
301-419 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-420 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-421 ASHTON236 MD VERIZON MARYLAND, INC.
301-422 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-423 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-424 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-425 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-426 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-427 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-428 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-429 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-430 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-431 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-432 KEEDYSVL MD VERIZON MARYLAND, INC.
301-433 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-434 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-435 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-436 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-437 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-438 WSNGTNZN12 MD VERIZON MARYLAND, INC.
301-439 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-440 WSHNGTNZN5 MD NEXTEL COMMUNICATIONS, INC.
301-441 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-442 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-443 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-444 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-445 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-446 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-447 EMMITSBURG MD VERIZON MARYLAND, INC.
301-448 WSHNGTNZN3 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-449 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-450 MD
301-451 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-452 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-453 KITZMILLER MD VERIZON MARYLAND, INC.
301-454 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-455 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-456 WSHNGTNZN5 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-457 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-458 WSHNGTNZN4 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-459 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-460 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-461 WSNGTNZN10 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-462 MYERSVILLE MD SPRINT SPECTRUM L.P. - MD
301-463 LONACONING MD VERIZON MARYLAND, INC.
301-464 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-465 MYERSVILLE MD SPRINT SPECTRUM L.P. - MD
301-466 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-467 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-468 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-469 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-470 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-471 FREDERICK MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-472 MECHANCSVL MD VERIZON MARYLAND, INC.
301-473 FREDERICK MD VERIZON MARYLAND, INC.
301-474 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-475 LEONARDTN MD VERIZON MARYLAND, INC.
301-476 ASHTON236 MD VERIZON MARYLAND, INC.
301-477 WSNG236Z13 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-478 FLINTSTONE MD VERIZON MARYLAND, INC.
301-479 WSNG236Z13 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
301-480 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-481 LEONARDTN MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-482 DAMASCS236 MD VERIZON MARYLAND, INC.
301-483 LAUREL236 MD VERIZON MARYLAND, INC.
301-484 WSHNGTNZN4 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-485 WSHNGTNZN6 MD COMCAST PHONE OF MARYLAND, INC. - MD
301-486 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-487 MYERSVILLE MD VERIZON MARYLAND, INC.
301-488 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-489 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-490 LAUREL236 MD VERIZON MARYLAND, INC.
301-491 HAGERSTOWN MD USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD
301-492 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-493 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-494 WSNG238Z15 MD VERIZON MARYLAND, INC.
301-495 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-496 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-497 LAUREL236 MD VERIZON MARYLAND, INC.
301-498 LAUREL236 MD VERIZON MARYLAND, INC.
301-499 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-501 OAKLAND MD DOBSON CELLULAR SYSTEMS, INC.
301-502 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-503 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC