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
603-404 7 Derry NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2024-04-23   
603-404 8 Derry NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-08-10   
603-404 9 Derry NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-07-30   
603-405 A Somersworth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-405 0 Somersworth NH ROCHNHWE4MD  314C IDT AMERICA, CORP. - NH 122   2020-12-24   
603-405 1 Somersworth NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-07-04   
603-405 2 Somersworth NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2017-02-16   
603-405 6 Somersworth NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2016-06-17   
603-405 8 Somersworth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2017-05-04   
603-406 A Concord NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-406 0 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2020-08-14   
603-406 1 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2020-01-13   
603-406 2 Concord NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2019-12-26   
603-406 3 Concord NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2019-08-07   
603-406 4 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-03-26   
603-406 5 Concord NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2019-11-02   
603-406 6 Concord NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-04-04   
603-406 7 Concord NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-05-18   
603-406 8 Concord NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-02-05   
603-406 9 Concord NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2019-02-23   
603-407 A Belmont NH MNCHNHCO46Z  829J PAETEC ITEL, LLC 122   2025-04-30   
603-407 0 Belmont NH MNCHNHAC3MD  939H COMMIO, LLC 122   2022-11-05   
603-407 8 Belmont NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-06-30   
603-408 A Berlin NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-408 0 Berlin NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-06-30   
603-408 1 Berlin NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2025-10-10   
603-408 2 Berlin NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2020-03-24   
603-408 3 Berlin NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2025-04-11   
603-408 4 Berlin NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2025-06-02   
603-408 5 Berlin NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2025-07-29   
603-408 6 Berlin NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-05-17   
603-408 7 Berlin NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2025-03-14   
603-408 8 Berlin NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2016-01-23   
603-408 9 Berlin NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2016-01-23   
603-409 A Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-409 0 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2017-08-21   
603-409 1 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-08-30   
603-409 2 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-03-09   
603-409 3 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2025-02-10   
603-409 4 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2017-10-14   
603-409 5 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2016-07-23   
603-409 6 Laconia NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2020-05-24   
603-409 7 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2016-02-29   
603-409 8 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122   2016-12-16   
603-409 9 Laconia NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-11-27   
603-410 A Concord NH MNCHNHCO44Z  829J PAETEC ITEL, LLC 122   2025-04-30   
603-410 0 Concord NH   145J TERRA NOVA TELECOM INC. 122   2025-08-31   
603-410 1 Concord NH MNCHNHCO47Z  829J PAETEC ITEL, LLC 122   2001-09-24   
603-410 2 Concord NH MNCHNHCO47Z  829J PAETEC ITEL, LLC 122   2004-09-10   
603-410 3 Concord NH MNCHNHCO44Z  829J PAETEC ITEL, LLC 122   2005-05-02   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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