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
603-365 2 Merrimack NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2021-09-10   
603-365 3 Merrimack NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2021-09-10   
603-365 4 Merrimack NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2015-12-04   
603-365 5 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-365 6 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-365 7 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-365 8 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-365 9 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-366 A Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-366 0 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-01-21   
603-366 1 Laconia NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2006-04-03   
603-366 2 Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-366 3 Laconia NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2013-03-05   
603-366 4 Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-366 5 Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-366 6 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-01-05   
603-366 7 Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-366 8 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2012-10-23   
603-366 9 Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-367 A Madison NH MDSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-367 0 Madison NH MNCHNHCOXCZ  996E BANDWIDTH.COM CLEC, LLC - NH 122   2002-09-19   
603-367 1 Madison NH   145J TERRA NOVA TELECOM INC. 122   2023-01-04   
603-367 2 Madison NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2008-03-05   
603-367 3 Madison NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-367 4 Madison NH MDSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-367 7 Madison NH MNCHNHCO42Z  793K TWC IP ENABLED SERVICES, LLC 122   2012-10-02   
603-367 8 Madison NH MDSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-367 9 Madison NH MDSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-368 A Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-368 0 Portsmouth NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2021-09-24   
603-368 1 Portsmouth NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2021-09-24   
603-368 2 Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2018-02-26   
603-368 3 Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2018-02-26   
603-368 4 Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2018-02-26   
603-368 5 Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2018-02-26   
603-368 6 Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-06-21   
603-368 7 Portsmouth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-01-31   
603-368 8 Portsmouth NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2019-08-30   
603-368 9 Portsmouth NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2021-08-02   
603-369 A Concord NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-369 0 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2004-09-13   
603-369 1 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2004-11-13   
603-369 2 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2006-02-06   
603-369 3 Concord NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2004-11-01   
603-369 4 Concord NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-369 5 Concord NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2003-10-25   
603-369 6 Concord NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-05-01   
603-369 7 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2006-10-11   
603-369 8 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2006-10-11   
603-369 9 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2006-04-09   
603-370 A Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-370 0 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-370 1 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-370 2 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2006-12-02   
603-370 3 Candia NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-10-02   
603-370 4 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-09-20   
603-370 5 Candia NH PTMONH073MD  9827 OTEL TELEKOM, INC. - NH 122   2011-03-07   
603-370 6 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-01-04   
603-370 7 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-370 8 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-370 9 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-371 A Peterborough NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-371 0 Peterborough NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2000-05-29   
603-371 1 Peterborough NH MNCHNHCOX9Y  2698 CTC COMMUNICATIONS CORP. - NH 122   2004-05-09   
603-371 2 Peterborough NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-07-15   
603-371 3 Peterborough NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-07-15   
603-371 4 Peterborough NH PTMONH073MD  9827 OTEL TELEKOM, INC. - NH 122   2002-09-19   
603-371 5 Peterborough NH PTMONH073MD  9827 OTEL TELEKOM, INC. - NH 122   2005-01-24   
603-371 6 Peterborough NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-371 7 Peterborough NH   145J TERRA NOVA TELECOM INC. 122   2021-05-27   
603-371 8 Peterborough NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2006-05-03   
603-371 9 Peterborough NH MNCHNHCOX9Y  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122   2000-05-24   
603-372 A Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-372 0 Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-372 1 Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-372 2 Claremont NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2007-05-03   
603-372 3 Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-372 4 Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-372 5 Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-372 6 Claremont NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-11-03   
603-372 7 Claremont NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-05-02   
603-372 8 Claremont NH   145J TERRA NOVA TELECOM INC. 122   2022-07-01   
603-372 9 Claremont NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-373 A Portsmouth NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-373 0 Portsmouth NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2001-01-01   
603-373 1 Portsmouth NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2004-11-01   
603-373 2 Portsmouth NH MNCHNHCO37Z  7421 AT&T - LOCAL 122   2001-07-01   
603-373 3 Portsmouth NH   145J TERRA NOVA TELECOM INC. 122   2021-05-27   
603-373 4 Portsmouth NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2004-04-18   
603-373 5 Portsmouth NH   4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-373 6 Portsmouth NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-373 7 Portsmouth NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122   2005-08-05   
603-373 8 Portsmouth NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2003-02-04   
603-373 9 Portsmouth NH MNCHNHCOX9Y  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122   2000-07-03   
603-374 A Bartlett NH BRTLNHGERS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-374 0 Bartlett NH BRTLNHGERS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-374 1 Bartlett NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2024-08-07   
603-374 2 Bartlett NH BRTLNHGERS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-374 3 Bartlett NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-01-05   
603-374 4 Bartlett NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-09-10   

<< 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: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.