Local Calling Guide

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

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-361 5 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-02-17   
603-361 6 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2003-11-19   
603-361 7 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-01-19   
603-361 8 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-06-03   
603-361 9 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-08-02   
603-362 A Hampstead NH ATSNNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-362 0 Hampstead NH   829J PAETEC ITEL, LLC 122   2001-03-26   
603-362 1 Hampstead NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2005-06-15   
603-362 2 Hampstead NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-02-02   
603-362 3 Hampstead NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2016-06-01   
603-362 4 Hampstead NH ATSNNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-362 5 Hampstead NH ATSNNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-362 6 Hampstead NH ATSNNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-362 7 Hampstead NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2013-10-01   
603-362 8 Hampstead NH ATSNNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-362 9 Hampstead NH ATSNNHMARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-363 A Spofford NH SPFRNHMSRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-363 1 Spofford NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2002-01-08   
603-363 2 Spofford NH SPFRNHMSRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-363 3 Spofford NH MNCHNHCO42Z  793K TWC IP ENABLED SERVICES, LLC 122   2024-01-07   
603-363 4 Spofford NH SPFRNHMSRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-363 5 Spofford NH   829J PAETEC ITEL, LLC 122   2002-10-14   
603-363 8 Spofford NH SPFRNHMSRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-363 9 Spofford NH SPFRNHMSRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-364 A Gilmanton Iron Works NH GLTNNHXARP0  0049 UNION TEL. CO. 122      
603-364 0 Gilmanton Iron Works NH GLTNNHXARP0  0049 UNION TEL. CO. 122      
603-364 7 Gilmanton Iron Works NH   145J TERRA NOVA TELECOM INC. 122   2025-07-11   
603-365 A Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-365 0 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-365 1 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
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   829J PAETEC ITEL, LLC 122   2006-04-03   
603-366 2 Laconia NH WERSNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-366 3 Laconia NH   829J PAETEC ITEL, LLC 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   829J PAETEC ITEL, LLC 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   829J PAETEC ITEL, LLC 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   829J PAETEC ITEL, LLC 122   2025-04-30   
603-371 0 Peterborough NH   829J PAETEC ITEL, LLC 122   2000-05-29   
603-371 1 Peterborough NH   829J PAETEC ITEL, LLC 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 7 Peterborough NH   145J TERRA NOVA TELECOM INC. 122   2021-05-27   
603-371 8 Peterborough NH   829J PAETEC ITEL, LLC 122   2006-05-03   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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