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Area Codes > 603 > Central Office Codes

Exchange Rate Center State Operating Company
603-406 NH
603-407 NH
603-408 NH
603-409 NH
603-410 CONCORD NH CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC
603-411 NH
603-412 PLYMOUTH NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-413 MANCHESTER NH RNK, INC.
603-414 SUNAPEE NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-415 CONCORD NH FREEDOM RING COMMUNICATIONS, LLC
603-416 NH
603-417 NH
603-418 EXETER NH CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC
603-419 SUNCOOK NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-420 MERRIMACK NH BROOKS FIBER COMMUNICATIONS - NEW HAMPSHIRE
603-421 DERRY NH VERIZON NEW ENGLAND INC.
603-422 PORTSMOUTH NH VERIZON NEW ENGLAND INC.
603-423 MERRIMACK NH VERIZON NEW ENGLAND INC.
603-424 MERRIMACK NH VERIZON NEW ENGLAND INC.
603-425 DERRY NH VERIZON NEW ENGLAND INC.
603-426 DERRY NH VERIZON NEW ENGLAND INC.
603-427 PORTSMOUTH NH VERIZON NEW ENGLAND INC.
603-428 HENNIKER NH MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY
603-429 MERRIMACK NH VERIZON NEW ENGLAND INC.
603-430 PORTSMOUTH NH VERIZON NEW ENGLAND INC.
603-431 PORTSMOUTH NH VERIZON NEW ENGLAND INC.
603-432 DERRY NH VERIZON NEW ENGLAND INC.
603-433 PORTSMOUTH NH VERIZON NEW ENGLAND INC.
603-434 DERRY NH VERIZON NEW ENGLAND INC.
603-435 PITTSFIELD NH VERIZON NEW ENGLAND INC.
603-436 PORTSMOUTH NH VERIZON NEW ENGLAND INC.
603-437 DERRY NH VERIZON NEW ENGLAND INC.
603-438 NASHUA NH SPRINT SPECTRUM L.P.
603-439 KEENE NH CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC
603-440 MERRIMACK NH VERIZON NEW ENGLAND INC.
603-441 WINCHESTER NH GLOBAL NAPS, INC. - NH
603-442 LEBANON NH VERIZON NEW ENGLAND INC.
603-443 LEBANON NH VERIZON NEW ENGLAND INC.
603-444 LITTLETON NH VERIZON NEW ENGLAND INC.
603-445 NO WALPOLE NH VERIZON NEW ENGLAND INC.
603-446 MARLOW NH VERIZON NEW ENGLAND INC.
603-447 CONWAY NH VERIZON NEW ENGLAND INC.
603-448 LEBANON NH VERIZON NEW ENGLAND INC.
603-449 MILAN NH VERIZON NEW ENGLAND INC.
603-451 MILAN NH GLOBAL NAPS, INC. - NH
603-452 CONWAY NH FREEDOM RING COMMUNICATIONS, LLC
603-453 LITTLETON NH GLOBAL NAPS, INC. - NH
603-454 SUNAPEE NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-455 LACONIA NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-456 WARNER NH MERRIMACK COUNTY TELEPHONE CO.
603-457 PORTSMOUTH NH GLOBAL NAPS, INC. - NH
603-458 SALEM NH COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH
603-459 NASHUA NH LIGHTSHIP TELECOM, LLC - NH
603-460 DEERFIELD NH BROOKS FIBER COMMUNICATIONS - NEW HAMPSHIRE
603-461 MERRIMACK NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-462 DEERFIELD NH FREEDOM RING COMMUNICATIONS, LLC
603-463 DEERFIELD NH VERIZON NEW ENGLAND INC.
603-464 HILLSBORO NH MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY
603-465 HOLLIS NH HOLLIS TELEPHONE COMPANY, INC.
603-466 GORHAM NH VERIZON NEW ENGLAND INC.
603-467 MANCHESTER NH VERIZON NEW ENGLAND INC.
603-468 SEABROOK NH FREEDOM RING COMMUNICATIONS, LLC
603-469 MERIDEN NH KEARSARGE TELEPHONE CO.
603-470 CONCORD NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-471 BEDFORD NH VERIZON NEW ENGLAND INC.
603-472 BEDFORD NH VERIZON NEW ENGLAND INC.
603-473 MILTON ML NH VERIZON NEW ENGLAND INC.
603-474 SEABROOK NH VERIZON NEW ENGLAND INC.
603-475 SALEM NH BELL ATLANTIC NYNEX MOBILE
603-476 CTRSANDWIH NH VERIZON NEW ENGLAND INC.
603-477 CLAREMONT NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-478 HLLSBUPVLG NH GRANITE STATE TELEPHONE, INC.
603-479 DERRY NH NEW CINGULAR WIRELESS PCS, LLC - MA
603-480 MANCHESTER NH VERIZON NEW ENGLAND INC.
603-481 PLYMOUTH NH RURAL CELLULAR CORPORATION
603-482 ERROL NH VERIZON NEW ENGLAND INC.
603-483 CANDIA NH VERIZON NEW ENGLAND INC.
603-484 NASHUA NH GLOBAL NAPS, INC. - NH
603-485 SUNCOOK NH VERIZON NEW ENGLAND INC.
603-486 MANCHESTER NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-487 NEW BOSTON NH VERIZON NEW ENGLAND INC.
603-488 BEDFORD NH COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH
603-489 HAMPSTEAD NH COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH
603-490 DERRY NH BELL ATLANTIC NYNEX MOBILE
603-491 CONCORD NH BELL ATLANTIC NYNEX MOBILE
603-492 MANCHESTER NH VERIZON NEW ENGLAND INC.
603-493 MERRIMACK NH BELL ATLANTIC NYNEX MOBILE
603-494 MERRIMACK NH BELL ATLANTIC NYNEX MOBILE
603-495 WASHINGTON NH GRANITE STATE TELEPHONE, INC.
603-496 CONCORD NH BELL ATLANTIC NYNEX MOBILE
603-497 GOFFSTOWN NH VERIZON NEW ENGLAND INC.
603-498 PORTSMOUTH NH BELL ATLANTIC NYNEX MOBILE
603-499 KEENE NH LEVEL 3 COMMUNICATIONS - NH
603-501 PORTSMOUTH NH PAETEC COMMUNICATIONS, INC. - NH
603-502 PORTSMOUTH NH NEW CINGULAR WIRELESS PCS, LLC - MA
603-503 LANCASTER NH BROOKS FIBER COMMUNICATIONS - NEW HAMPSHIRE
603-504 CLAREMONT NH UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE
603-505 DERRY NH BELL ATLANTIC NYNEX MOBILE
603-506 DANBURY NH GLOBAL NAPS, INC. - NH
603-507 CANAAN NH GLOBAL NAPS, INC. - NH