Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-952 1 Salem NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-11-23   
603-952 2 Salem NH   829J PAETEC ITEL, LLC 122   2010-06-30   
603-952 3 Salem NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-09-27   
603-952 4 Salem NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-952 5 Salem NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2012-10-05   
603-952 6 Salem NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2012-10-05   
603-952 7 Salem NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-06-19   
603-952 8 Salem NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-10-16   
603-952 9 Salem NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2013-12-05   
603-953 A Dover NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-953 0 Dover NH   829J PAETEC ITEL, LLC 122      
603-953 1 Dover NH   829J PAETEC ITEL, LLC 122      
603-953 2 Dover NH   829J PAETEC ITEL, LLC 122      
603-953 3 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2004-12-03   
603-953 4 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2005-11-22   
603-953 5 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2006-11-02   
603-953 6 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2007-09-01   
603-953 7 Dover NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2008-02-03   
603-953 8 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-04-14   
603-953 9 Dover NH   829J PAETEC ITEL, LLC 122      
603-956 A Portsmouth NH MNCHNHCO18Z  197D VONAGE AMERICA LLC 122      
603-956 0 Portsmouth NH   939H COMMIO, LLC 122   2022-11-24   
603-956 1 Portsmouth NH   073H TELNYX LLC 122   2022-12-15   
603-956 2 Portsmouth NH   197D VONAGE AMERICA LLC 122   2022-09-23   
603-956 3 Portsmouth NH   637E ONVOY, LLC - NH 122   2022-09-29   
603-956 4 Portsmouth NH   637E ONVOY, LLC - NH 122   2022-09-29   
603-956 5 Portsmouth NH   637E ONVOY, LLC - NH 122   2022-12-23   
603-956 6 Portsmouth NH   637E ONVOY, LLC - NH 122   2023-08-20   
603-956 7 Portsmouth NH   637E ONVOY, LLC - NH 122   2023-05-08   
603-956 8 Portsmouth NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2024-01-02   
603-956 9 Portsmouth NH   637E ONVOY, LLC - NH 122   2023-06-23   
603-957 A Portsmouth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-957 0 Portsmouth NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-957 1 Portsmouth NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-957 2 Portsmouth NH   6386 BELL ATLANTIC MOBILE, INC 122   2015-11-28   
603-957 3 Portsmouth NH   829J PAETEC ITEL, LLC 122   2006-03-20   
603-957 4 Portsmouth NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122   2008-09-24   
603-957 5 Portsmouth NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122   2009-07-15   
603-957 6 Portsmouth NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2011-06-19   
603-957 7 Portsmouth NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2011-06-19   
603-957 8 Portsmouth NH   6386 BELL ATLANTIC MOBILE, INC 122   2009-07-03   
603-957 9 Portsmouth NH   6386 BELL ATLANTIC MOBILE, INC 122   2017-02-17   
603-960 A Campton NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-960 0 Campton NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-03-16   
603-960 1 Campton NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-07-03   
603-960 2 Campton NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-10-03   
603-960 4 Campton NH   6386 BELL ATLANTIC MOBILE, INC 122   2011-05-14   
603-960 8 Campton NH   073H TELNYX LLC 122   2024-07-27   
603-960 9 Campton NH   793K TWC IP ENABLED SERVICES, LLC 122   2012-10-02   
603-961 A Chichester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-961 0 Chichester NH   318J COMCAST IP PHONE, LLC 122   2010-01-25   
603-964 A Rye Beach NH RYBHNHCEDS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 0 Rye Beach NH   318J COMCAST IP PHONE, LLC 122   2011-11-04   
603-964 1 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 2 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 3 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 4 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 5 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 6 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 7 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 8 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-964 9 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-965 A Derry NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-965 0 Derry NH   829J PAETEC ITEL, LLC 122      
603-965 1 Derry NH   829J PAETEC ITEL, LLC 122      
603-965 2 Derry NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-10   
603-965 3 Derry NH   318J COMCAST IP PHONE, LLC 122   2006-11-30   
603-965 4 Derry NH   318J COMCAST IP PHONE, LLC 122   2006-11-30   
603-965 5 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2005-03-04   
603-965 6 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2005-07-02   
603-965 7 Derry NH   829J PAETEC ITEL, LLC 122   2006-12-01   
603-965 8 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2005-09-30   
603-965 9 Derry NH   829J PAETEC ITEL, LLC 122      
603-966 A Nashua NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-966 0 Nashua NH   6386 BELL ATLANTIC MOBILE, INC 122   2011-08-01   
603-966 1 Nashua NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-966 2 Nashua NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-966 3 Nashua NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-966 4 Nashua NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-966 5 Nashua NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2005-09-24   
603-966 6 Nashua NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-966 7 Nashua NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-966 8 Nashua NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2005-11-17   
603-966 9 Nashua NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-10-27   
603-967 A Hampton NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-967 4 Hampton NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-967 8 Hampton NH   318J COMCAST IP PHONE, LLC 122   2019-07-05   
603-968 A Ashland NH ASLDNHHIRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-968 0 Ashland NH   996E BANDWIDTH.COM CLEC, LLC - NH 122   2002-09-10   
603-968 1 Ashland NH   145J TERRA NOVA TELECOM INC. 122   2023-01-04   
603-968 2 Ashland NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-968 3 Ashland NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-968 4 Ashland NH   145J TERRA NOVA TELECOM INC. 122   2024-06-27   
603-968 5 Ashland NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-03   
603-968 6 Ashland NH   314C IDT AMERICA, CORP. - NH 122   2008-04-18   
603-968 7 Ashland NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-968 9 Ashland NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-969 A Portsmouth NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2024-02-09   
603-969 0 Portsmouth NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-969 1 Portsmouth NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.