About 603 Area Code
Located in: New Hampshire
Major Cities: Newmarket, Manchester, Nashua, Portsmouth, Lyme, Keene, Suncook, Salem, Milford, Errol, Berlin, Derry, Bristol, Concord, Colebrook, Plymouth, Winchester, Troy, Woodsville, Raymond, Dover, Plaistow, Hollis, Littleton, Merrimack, New boston, Tilton, Belmont, Piermont, Laconia, Hanover, Meredith, Barrington, Canaan, Claremont, Greenville, Durham, Bartlett, Chester, Enfield, Lebanon, Newport, Bedford, Milan, Tamworth, Hampstead, Rochester, Hinsdale, Kingston, Milton, Goffstown, Orford, Spofford, Madison, Candia, Ashland, Rye beach, Jackson, Jefferson, Exeter, Sunapee, Henniker, Pittsfield, Marlow, Conway, Warner, Deerfield, Hillsboro, Gorham, Seabrook, Meriden, Washington, Lancaster, Pelham, Wolfeboro, Hancock, New london, Weare, Jaffrey, Pittsburg, Greenfield, Dublin, Penacook, Alstead, Antrim, Hampton, Northwood, Pike, Groveton, Monroe, Salisbury, Wilton, Franklin, Plainfield, Epping, Chatham, New durham, Canterbury, Andover, Epsom, Contoocook, Farmington, Walpole, Warren, Danbury, Barnstead, Rumney, Boscawen, Chichester, Franconia, Whitefield, Lisbon, Sullivan, Alton, Bethlehem, Rindge, Sutton, Bradford
Major Carriers: , Comcast, Bandwidth/13 - Bandwidth.com - SVR, Teleport Communications America, LLC, Consolidated Communications, Inc., AT&T Wireless, Verizon Wireless, Sprint Spectrum, L.P., T-Mobile USA, Inc., Cricket Wireless - ATT - SVR, US Cellular Corp., Paetec Communications, Inc., CenturyLink, Level 3 Communications, LLC, Vonage Essentials - Sybase365, Vonage Retail - Level3 - Sybase365, AT&T Mobility, Pinger - Bandwidth.com - Sybase365, Bandwidth/RingCentral Messaging - Sybase365, Onvoy, LLC, Onvoy Spectrum, LLC, MCI Metro, ATS, Inc., Freedom Ring Communications, LLC, Time Warner Communications, Twilio Hosted - SMS-Sybase365/MMS-SVR, Conversent Communications, LLC, Enflick - Bandwidth.com - SVR, Telnyx LLC, Skype Communications SARL - Level3 - SVR, CRC Communications, Inc., Broadview Networks, Inc., Zipwhip/FairPoint Communications SMSEnabled - FairPointCommunications - Sybase365, Consolidated Communications Enterprise Services, Bandwidth.com CLEC, LLC, Vonage Network Inc., Lightship Telecom, LLC, Choice One Communications, Inc., CTC Communications, Bandwidth SMSEnabled - Bandwidth CLEC - Sybase365, Vonage/Nexmo - Sybase365, Republic Wireless - Bandwidth.com - Sybase365, Otel Telekom, Inc. - NH, TextNow - Bandwidth.com - SVR, Peerless Network, Onvoy/3 - Sybase365, Twilio - Inteliquent - SMS-Sybase365/MMS-SVR, Google (Grand Central) BWI - Bandwidth.com - SVR, TextPlus - Inteliquent - SVR, Twilio US1 - Level3 - SMS-Sybase365/MMS-SVR, TextPlus - 360 Networks - SVR
Prefixes in Area Code 603
603-200NEWMARKET
603-203MANCHESTER
603-204NASHUA
603-205PORTSMOUTH
603-206MANCHESTER
603-208LYME
603-209KEENE
603-210SUNCOOK
603-212SALEM
603-213MILFORD
603-214ERROL
603-215BERLIN
603-216DERRY
603-217BRISTOL
603-218MANCHESTER
603-219CONCORD
603-221NASHUA
603-222MANCHESTER
603-223CONCORD
603-224CONCORD
603-225CONCORD
603-226CONCORD
603-227CONCORD
603-228CONCORD
603-229CONCORD
603-230CONCORD
603-231DERRY
603-232MANCHESTER
603-233NASHUA
603-234DERRY
603-235DERRY
603-237COLEBROOK
603-238PLYMOUTH
603-239WINCHESTER
603-240MANCHESTER
603-241MANCHESTER
603-242TROY
603-243WOODSVILLE
603-244RAYMOND
603-245PORTSMOUTH
603-247DERRY
603-248DOVER
603-249MILFORD
603-254PLYMOUTH
603-257PLAISTOW
603-258HOLLIS
603-259LITTLETON
603-260DERRY
603-261MERRIMACK
603-262MERRIMACK
603-263MANCHESTER
603-264MANCHESTER
603-265NEW BOSTON
603-266TILTON
603-267BELMONT
603-268SUNCOOK
603-270SUNCOOK
603-271CONCORD
603-272PIERMONT
603-273LACONIA
603-275DERRY
603-277HANOVER
603-279MEREDITH
603-280BARRINGTON
603-281NASHUA
603-282CANAAN
603-283KEENE
603-285DOVER
603-286TILTON
603-287CLAREMONT
603-288NASHUA
603-289MANCHESTER
603-290CONCORD
603-291GREENVILLE
603-292NEWMARKET
603-293LACONIA
603-294PORTSMOUTH
603-295DURHAM
603-296MANCHESTER
603-299BARTLETT
603-300CHESTER
603-302MANCHESTER
603-303RAYMOND
603-304ENFIELD
603-305NASHUA
603-306LEBANON
603-308HANOVER
603-309NEWPORT
603-310BEDFORD
603-312DOVER
603-313KEENE
603-314MANCHESTER
603-315MANCHESTER
603-316MILFORD
603-317MILAN
603-318NASHUA
603-319PORTSMOUTH
603-320NASHUA
603-321NASHUA
603-323TAMWORTH
603-324NASHUA
603-325NEW BOSTON
603-326BERLIN
603-327SALEM
603-328SALEM
603-329HAMPSTEAD
603-330ROCHESTER
603-331COLEBROOK
603-332ROCHESTER
603-333CONCORD
603-334PORTSMOUTH
603-335ROCHESTER
603-336HINSDALE
603-337ROCHESTER
603-338KEENE
603-339DERRY
603-340SUNCOOK
603-341MERRIMACK
603-342BERLIN
603-343DOVER
603-344SUNCOOK
603-345MERRIMACK
603-346PLYMOUTH
603-347KINGSTON
603-350MILTON
603-351GOFFSTOWN
603-352KEENE
603-353ORFORD
603-354KEENE
603-355KEENE
603-357KEENE
603-358KEENE
603-359LEBANON
603-360ORFORD
603-361MANCHESTER
603-362HAMPSTEAD
603-363SPOFFORD
603-365MERRIMACK
603-366LACONIA
603-367MADISON
603-368PORTSMOUTH
603-369CONCORD
603-370CANDIA
603-372CLAREMONT
603-373PORTSMOUTH
603-374BARTLETT
603-375ASHLAND
603-376DOVER
603-377MERRIMACK
603-378PLAISTOW
603-379RYE BEACH
603-380PORTSMOUTH
603-382PLAISTOW
603-383JACKSON
603-384GOFFSTOWN
603-385MANCHESTER
603-386SALEM
603-387LACONIA
603-388COLEBROOK
603-389DURHAM
603-390JEFFERSON
603-391MANCHESTER
603-392WINCHESTER
603-393LACONIA
603-395EXETER
603-396MERRIMACK
603-397DURHAM
603-400HOLLIS
603-401SALEM
603-402NASHUA
603-403ROCHESTER
603-404DERRY
603-406CONCORD
603-407BELMONT
603-408BERLIN
603-409LACONIA
603-410CONCORD
603-412PLYMOUTH
603-413MANCHESTER
603-414SUNAPEE
603-415CONCORD
603-416RAYMOND
603-417NASHUA
603-418EXETER
603-419SUNCOOK
603-420MERRIMACK
603-421DERRY
603-422PORTSMOUTH
603-423MERRIMACK
603-424MERRIMACK
603-425DERRY
603-426DERRY
603-427PORTSMOUTH
603-428HENNIKER
603-429MERRIMACK
603-430PORTSMOUTH
603-431PORTSMOUTH
603-432DERRY
603-433PORTSMOUTH
603-434DERRY
603-435PITTSFIELD
603-436PORTSMOUTH
603-437DERRY
603-438NASHUA
603-439KEENE
603-440MERRIMACK
603-442LEBANON
603-443LEBANON
603-444LITTLETON
603-446MARLOW
603-447CONWAY
603-448LEBANON
603-449MILAN
603-450CONCORD
603-452CONWAY
603-454SUNAPEE
603-455LACONIA
603-456WARNER
603-458SALEM
603-459NASHUA
603-460DEERFIELD
603-461MERRIMACK
603-462DEERFIELD
603-463DEERFIELD
603-464HILLSBORO
603-465HOLLIS
603-466GORHAM
603-467MANCHESTER
603-468SEABROOK
603-469MERIDEN
603-470CONCORD
603-471BEDFORD
603-472BEDFORD
603-474SEABROOK
603-475SALEM
603-477CLAREMONT
603-479DERRY
603-480MANCHESTER
603-481PLYMOUTH
603-482ERROL
603-483CANDIA
603-484NASHUA
603-485SUNCOOK
603-486MANCHESTER
603-487NEW BOSTON
603-488BEDFORD
603-489HAMPSTEAD
603-490DERRY
603-491CONCORD
603-492MANCHESTER
603-493MERRIMACK
603-494MERRIMACK
603-495WASHINGTON
603-496CONCORD
603-497GOFFSTOWN
603-498PORTSMOUTH
603-499KEENE
603-501PORTSMOUTH
603-502PORTSMOUTH
603-503LANCASTER
603-504CLAREMONT
603-505DERRY
603-506MANCHESTER
603-507ROCHESTER
603-508PELHAM
603-509ROCHESTER
603-510MERIDEN
603-512MANCHESTER
603-513CONCORD
603-515WOLFEBORO
603-516DOVER
603-517MERRIMACK
603-518MANCHESTER
603-519EXETER
603-520LACONIA
603-521NASHUA
603-523CANAAN
603-524LACONIA
603-525HANCOCK
603-526NEW LONDON
603-527LACONIA
603-528LACONIA
603-529WEARE
603-530BRISTOL
603-531PORTSMOUTH
603-532JAFFREY
603-533MERRIMACK
603-534DOVER
603-535PLYMOUTH
603-536PLYMOUTH
603-537DERRY
603-538PITTSBURG
603-540MANCHESTER
603-541MANCHESTER
603-542CLAREMONT
603-543CLAREMONT
603-545CONCORD
603-546NASHUA
603-547GREENFIELD
603-548DERRY
603-549DERRY
603-551MANCHESTER
603-552DERRY
603-553DERRY
603-554MILFORD
603-556LACONIA
603-557NASHUA
603-558CLAREMONT
603-559PORTSMOUTH
603-560SALEM
603-561NASHUA
603-563DUBLIN
603-564MANCHESTER
603-565PENACOOK
603-566NASHUA
603-568CONCORD
603-569WOLFEBORO
603-570PORTSMOUTH
603-571DERRY
603-572NASHUA
603-573CONCORD
603-574ALSTEAD
603-575LITTLETON
603-576ORFORD
603-577NASHUA
603-578NASHUA
603-579NASHUA
603-580EXETER
603-581LACONIA
603-582MERRIMACK
603-583EXETER
603-586JEFFERSON
603-587CANDIA
603-588ANTRIM
603-589NASHUA
603-590DURHAM
603-591MANCHESTER
603-592SPOFFORD
603-593JAFFREY
603-594NASHUA
603-595NASHUA
603-596NASHUA
603-597LYME
603-598NASHUA
603-599NASHUA
603-601HAMPTON
603-604RYE BEACH
603-605DOVER
603-606MANCHESTER
603-608NORTHWOOD
603-609DOVER
603-610PORTSMOUTH
603-612PLAISTOW
603-613COLEBROOK
603-615MANCHESTER
603-616LITTLETON
603-617DOVER
603-618PIKE
603-620MERRIMACK
603-621MANCHESTER
603-622MANCHESTER
603-623MANCHESTER
603-624MANCHESTER
603-625MANCHESTER
603-626MANCHESTER
603-627MANCHESTER
603-628MANCHESTER
603-629MANCHESTER
603-630LACONIA
603-631LANCASTER
603-632ENFIELD
603-633MANCHESTER
603-634MANCHESTER
603-635PELHAM
603-636GROVETON
603-637BEDFORD
603-638MONROE
603-639MANCHESTER
603-640HANOVER
603-641MANCHESTER
603-642KINGSTON
603-643HANOVER
603-644MANCHESTER
603-645MANCHESTER
603-646HANOVER
603-647MANCHESTER
603-648SALISBURY
603-650HANOVER
603-652MILTON
603-653HANOVER
603-654WILTON
603-655MANCHESTER
603-656MANCHESTER
603-657MANCHESTER
603-658EXETER
603-659NEWMARKET
603-660GOFFSTOWN
603-661MANCHESTER
603-662CONWAY
603-663MANCHESTER
603-664BARRINGTON
603-665MANCHESTER
603-666MANCHESTER
603-667LEBANON
603-668MANCHESTER
603-669MANCHESTER
603-670MERRIMACK
603-671FRANKLIN
603-672MILFORD
603-673MILFORD
603-674MANCHESTER
603-675PLAINFIELD
603-676HANOVER
603-677MEREDITH
603-678LEBANON
603-679EPPING
603-680HILLSBORO
603-681SALEM
603-682MANCHESTER
603-683MERRIMACK
603-684LANCASTER
603-685SALEM
603-686EXETER
603-687JACKSON
603-689NASHUA
603-690CLAREMONT
603-693EPPING
603-694CHATHAM
603-695MANCHESTER
603-701NEW DURHAM
603-702KINGSTON
603-703MANCHESTER
603-704DERRY
603-705SALISBURY
603-706RAYMOND
603-707MEREDITH
603-708CANTERBURY
603-709PLAINFIELD
603-712PIKE
603-714BEDFORD
603-715CONCORD
603-716MANCHESTER
603-717CONCORD
603-718NASHUA
603-719KEENE
603-721MILFORD
603-722MANCHESTER
603-723BERLIN
603-724CONCORD
603-725TAMWORTH
603-727LEBANON
603-729TILTON
603-731CONCORD
603-732MILFORD
603-734EPPING
603-735ANDOVER
603-736EPSOM
603-737LACONIA
603-738CONCORD
603-740DOVER
603-741NEW BOSTON
603-742DOVER
603-743DOVER
603-744BRISTOL
603-746CONTOOCOOK
603-747WOODSVILLE
603-748WARNER
603-749DOVER
603-750DOVER
603-751PELHAM
603-752BERLIN
603-753PENACOOK
603-754LANCASTER
603-755FARMINGTON
603-756WALPOLE
603-757KEENE
603-758HAMPTON
603-759NASHUA
603-760SEABROOK
603-761LITTLETON
603-762KEENE
603-763SUNAPEE
603-764WARREN
603-765NASHUA
603-766PORTSMOUTH
603-767DOVER
603-768DANBURY
603-769MILFORD
603-770EXETER
603-771MANCHESTER
603-772EXETER
603-773EXETER
603-775EXETER
603-776BARNSTEAD
603-777EXETER
603-778EXETER
603-779PLYMOUTH
603-780CANAAN
603-781DOVER
603-782MANCHESTER
603-783CANTERBURY
603-785MANCHESTER
603-786RUMNEY
603-787WOODSVILLE
603-788LANCASTER
603-789DANBURY
603-791NASHUA
603-792MANCHESTER
603-793EXETER
603-795LYME
603-796BOSCAWEN
603-797PLAISTOW
603-798CHICHESTER
603-799MANCHESTER
603-800MEREDITH
603-801MILFORD
603-803KEENE
603-808ANTRIM
603-809NASHUA
603-812PORTSMOUTH
603-814SEABROOK
603-815DURHAM
603-816NASHUA
603-817DOVER
603-818DERRY
603-819PLAISTOW
603-820MERRIMACK
603-821NASHUA
603-822ROCHESTER
603-823FRANCONIA
603-824SALEM
603-828PORTSMOUTH
603-829SUNAPEE
603-831GREENFIELD
603-832LACONIA
603-833ROCHESTER
603-834DOVER
603-835ALSTEAD
603-836MANCHESTER
603-837WHITEFIELD
603-838LISBON
603-839FARMINGTON
603-840EPSOM
603-842DOVER
603-843NEWPORT
603-845DERRY
603-847SULLIVAN
603-848CONCORD
603-851MANCHESTER
603-852KEENE
603-853WOODSVILLE
603-854MANCHESTER
603-855ALTON
603-856CONCORD
603-858MANCHESTER
603-859NEW DURHAM
603-860MANCHESTER
603-861TAMWORTH
603-862DURHAM
603-863NEWPORT
603-864NASHUA
603-865NEWPORT
603-866DOVER
603-867MANCHESTER
603-868DURHAM
603-869BETHLEHEM
603-870SALEM
603-873SUNAPEE
603-874MONROE
603-875ALTON
603-877NEW LONDON
603-878GREENVILLE
603-879NASHUA
603-880NASHUA
603-881NASHUA
603-882NASHUA
603-883NASHUA
603-884NASHUA
603-885NASHUA
603-886NASHUA
603-887CHESTER
603-888NASHUA
603-889NASHUA
603-890SALEM
603-891NASHUA
603-892CONCORD
603-893SALEM
603-894SALEM
603-895RAYMOND
603-896SALEM
603-897NASHUA
603-898SALEM
603-899RINDGE
603-901CONWAY
603-902SUTTON
603-903KEENE
603-904WALPOLE
603-905BARRINGTON
603-906BARNSTEAD
603-910HAMPTON
603-912SALEM
603-913MERRIMACK
603-915GORHAM
603-918HAMPTON
603-921NASHUA
603-923ROCHESTER
603-926HAMPTON
603-927SUTTON
603-928SUNCOOK
603-929HAMPTON
603-930NASHUA
603-931CONCORD
603-932MANCHESTER
603-933GREENFIELD
603-934FRANKLIN
603-935MANCHESTER
603-937MEREDITH
603-938BRADFORD
603-941WOLFEBORO
603-942NORTHWOOD
603-943NASHUA
603-945MANCHESTER
603-947PLYMOUTH
603-948ROCHESTER
603-951MILAN
603-952SALEM
603-953DOVER
603-957PORTSMOUTH
603-961CHICHESTER
603-964RYE BEACH
603-965DERRY
603-966NASHUA
603-967HAMPTON
603-968ASHLAND
603-969PORTSMOUTH
603-970DOVER
603-971RINDGE
603-973ROCHESTER
603-974PLAISTOW
603-975BOSCAWEN
603-977ANDOVER
603-978DOVER
603-988PORTSMOUTH
603-989PIKE
603-991LITTLETON
603-992DANBURY
603-994ROCHESTER
603-995HENNIKER
603-996PLYMOUTH
603-997HAMPTON
603-998LACONIA
603-999SALEM