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
603-414 7 Sunapee NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-415 A Concord NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-416 A Raymond NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-416 0 Raymond NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-07-30   
603-416 1 Raymond NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2022-02-21   
603-416 2 Raymond NH MNCHNHCO23Z  073H TELNYX LLC 122   2022-12-23   
603-416 3 Raymond NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2023-07-08   
603-416 4 Raymond NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2023-09-22   
603-416 5 Raymond NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2024-08-30   
603-416 6 Raymond NH   5562 METROPCS, INC. 122   2024-02-11   
603-416 7 Raymond NH   6386 BELL ATLANTIC MOBILE, INC 122   2025-04-11   
603-416 8 Raymond NH MNCHNHAC3MD  939H COMMIO, LLC 122   2022-06-12   
603-416 9 Raymond NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2019-02-23   
603-417 A Nashua NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-417 0 Nashua NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2016-07-11   
603-417 1 Nashua NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2017-11-21   
603-417 2 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2016-01-01   
603-417 3 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2016-03-07   
603-417 4 Nashua NH MNCHNHCOXCZ  996E BANDWIDTH.COM CLEC, LLC - NH 122   2016-04-07   
603-417 5 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2016-09-08   
603-417 6 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2015-09-24   
603-417 7 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2015-11-26   
603-417 8 Nashua NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-10-20   
603-417 9 Nashua NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2015-06-14   
603-418 A Exeter NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-418 0 Exeter NH   829J PAETEC ITEL, LLC 122   2000-05-24   
603-418 1 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2024-11-17   
603-418 2 Exeter NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2004-02-24   
603-418 3 Exeter NH   829J PAETEC ITEL, LLC 122   2006-06-26   
603-418 4 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-01-05   
603-418 5 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-08-21   
603-418 6 Exeter NH   829J PAETEC ITEL, LLC 122      
603-418 7 Exeter NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2014-09-16   
603-418 8 Exeter NH   829J PAETEC ITEL, LLC 122   2000-05-30   
603-418 9 Exeter NH   829J PAETEC ITEL, LLC 122   2000-07-03   
603-419 A Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-419 0 Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-419 1 Suncook NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-06-04   
603-419 2 Suncook NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-04-25   
603-419 3 Suncook NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-04-25   
603-419 5 Suncook NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-06-11   
603-419 6 Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-419 7 Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-419 8 Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-419 9 Suncook NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-420 A Merrimack NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-420 0 Merrimack NH MNCHNHCO23Z  073H TELNYX LLC 122   2022-10-21   
603-420 1 Merrimack NH   829J PAETEC ITEL, LLC 122   2001-09-24   
603-420 2 Merrimack NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2023-03-31   
603-420 4 Merrimack NH   145J TERRA NOVA TELECOM INC. 122   2025-10-29   
603-420 5 Merrimack NH   829J PAETEC ITEL, LLC 122   2006-05-01   
603-420 7 Merrimack NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2022-12-02   
603-420 8 Merrimack NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2009-03-22   
603-420 9 Merrimack NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-421 A Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 0 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 1 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 2 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 3 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 4 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-421 5 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 6 Derry NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-10-02   
603-421 7 Derry NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-11-21   
603-421 8 Derry NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2012-10-12   
603-421 9 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 A Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 0 Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 1 Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 2 Portsmouth NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-03-29   
603-422 3 Portsmouth NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-03-29   
603-422 4 Portsmouth NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-11-22   
603-422 5 Portsmouth NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-11-22   
603-422 6 Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 7 Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 8 Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 9 Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 A Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 0 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 1 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 2 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 3 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 4 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 5 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 6 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 7 Merrimack NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2024-08-09   
603-423 8 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 9 Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-424 A Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 A Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 0 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 1 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 2 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 3 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-425 4 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-425 5 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 6 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 7 Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 8 Derry NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2007-09-18   
603-425 9 Derry NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-08-01   
603-426 A Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 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, 16 Oct 2025 03:04:18 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.