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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
603-585 1 Fitzwilliam NH MNCHNHCO42Z  793K TWC IP ENABLED SERVICES, LLC 122   2024-01-01   
603-585 2 Fitzwilliam NH FTZWNHUTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 3 Fitzwilliam NH FTZWNHUTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 4 Fitzwilliam NH   145J TERRA NOVA TELECOM INC. 122   2021-05-27   
603-585 5 Fitzwilliam NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-585 6 Fitzwilliam NH FTZWNHUTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 7 Fitzwilliam NH FTZWNHUTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 9 Fitzwilliam NH FTZWNHUTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-586 A Jefferson NH JFSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-586 0 Jefferson NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-15   
603-586 4 Jefferson NH JFSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-586 5 Jefferson NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2003-03-23   
603-586 6 Jefferson NH MNCHNHCO42Z  793K TWC IP ENABLED SERVICES, LLC 122   2012-10-02   
603-586 7 Jefferson NH JFSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-586 9 Jefferson NH JFSNNHYARS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2014-06-20   
603-587 A Candia NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-587 0 Candia NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2000-07-01   
603-587 1 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-03-14   
603-587 2 Candia NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2012-12-10   
603-587 3 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2023-09-06   
603-587 4 Candia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2026-01-15   
603-587 7 Candia NH MNCHNHCO22Z  073H TELNYX LLC 122   2023-10-06   
603-587 8 Candia NH MNCHNHCO47Z  829J PAETEC ITEL, LLC 122   2002-10-14   
603-587 9 Candia NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-588 A Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 0 Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 2 Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 3 Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 4 Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 5 Antrim NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2026-03-14   
603-588 6 Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 8 Antrim NH ANTRNHXARP0  3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-589 A Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122   2025-04-30   
603-589 0 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 1 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 2 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 3 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 4 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 5 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122   2006-12-30   
603-589 6 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 7 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122   2007-07-20   
603-589 8 Nashua NH MNCHNHCO45Z  829J PAETEC ITEL, LLC 122      
603-589 9 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2012-04-24   
603-590 A Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 0 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 1 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 2 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 3 Durham NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2026-03-14   
603-590 4 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 5 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 6 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 7 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 8 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 9 Durham NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-591 A Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 0 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 1 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 2 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 3 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 4 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 5 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 6 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 7 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 8 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 9 Manchester NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-05-13   
603-592 A Spofford NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-592 1 Spofford NH   145J TERRA NOVA TELECOM INC. 122   2024-12-28   
603-592 4 Spofford NH PTMONH073MD  9827 OTEL TELEKOM, INC. - NH 122   2002-09-19   
603-592 5 Spofford NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-08-29   
603-592 8 Spofford NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2026-05-02   
603-592 9 Spofford NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-593 A Jaffrey NH MNCHNHCO47Z  829J PAETEC ITEL, LLC 122   2025-04-30   
603-593 0 Jaffrey NH MNCHNHCO47Z  829J PAETEC ITEL, LLC 122   2003-11-15   
603-593 1 Jaffrey NH MNCHNHCO47Z  829J PAETEC ITEL, LLC 122   2003-08-31   
603-593 2 Jaffrey NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-01-05   
603-593 3 Jaffrey NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-593 4 Jaffrey NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2011-10-07   
603-593 5 Jaffrey NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2006-10-31   
603-593 6 Jaffrey NH PTMONH073MD  9827 OTEL TELEKOM, INC. - NH 122   2007-06-04   
603-593 7 Jaffrey NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-07-07   
603-593 8 Jaffrey NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2016-08-24   
603-593 9 Jaffrey NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2014-02-18   
603-594 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-595 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-596 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-597 A Lyme NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-597 1 Lyme NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2023-08-20   
603-597 6 Lyme NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2026-07-04   
603-597 8 Lyme NH   145J TERRA NOVA TELECOM INC. 122   2025-10-31   
603-597 9 Lyme NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-598 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-599 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-600 A Manchester NH MNCHNHAC3MD  939H COMMIO, LLC 122      
603-600 0 Manchester NH MNCHNHAC3MD  939H COMMIO, LLC 122   2020-07-26   
603-600 1 Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-01-02   
603-600 2 Manchester NH DOVRNHTHGMD  624H ONVOY SPECTRUM, LLC 122   2020-10-22   
603-600 3 Manchester NH MNCHNHBODS0  927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2020-10-30   
603-600 4 Manchester NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2021-01-02   
603-600 5 Manchester NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2020-12-04   
603-600 6 Manchester NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2020-10-15   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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