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
603-589 4 Nashua NH   829J PAETEC ITEL, LLC 122      
603-589 5 Nashua NH   829J PAETEC ITEL, LLC 122   2006-12-30   
603-589 6 Nashua NH   829J PAETEC ITEL, LLC 122      
603-589 7 Nashua NH   829J PAETEC ITEL, LLC 122   2007-07-20   
603-589 8 Nashua NH   829J PAETEC ITEL, LLC 122      
603-589 9 Nashua NH   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   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 1 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 2 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 4 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 5 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 6 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 7 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 8 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-590 9 Durham NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-591 A Manchester NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 0 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 1 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 2 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 3 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 4 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 5 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 6 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 7 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 8 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-591 9 Manchester NH   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   9827 OTEL TELEKOM, INC. - NH 122   2002-09-19   
603-592 5 Spofford NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-08-29   
603-592 7 Spofford NH   145J TERRA NOVA TELECOM INC. 122   2025-08-30   
603-592 9 Spofford NH   7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-593 A Jaffrey NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-593 0 Jaffrey NH   829J PAETEC ITEL, LLC 122   2003-11-15   
603-593 1 Jaffrey NH   829J PAETEC ITEL, LLC 122   2003-08-31   
603-593 2 Jaffrey NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2009-01-05   
603-593 3 Jaffrey NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-593 4 Jaffrey NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2011-10-07   
603-593 5 Jaffrey NH   318J COMCAST IP PHONE, LLC 122   2006-10-31   
603-593 6 Jaffrey NH   9827 OTEL TELEKOM, INC. - NH 122   2007-06-04   
603-593 7 Jaffrey NH   073H TELNYX LLC 122   2024-07-07   
603-593 8 Jaffrey NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2016-08-24   
603-593 9 Jaffrey NH   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   637E ONVOY, LLC - NH 122   2023-08-20   
603-597 3 Lyme NH   145J TERRA NOVA TELECOM INC. 122   2024-10-12   
603-597 8 Lyme NH   145J TERRA NOVA TELECOM INC. 122   2025-10-31   
603-597 9 Lyme NH   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   939H COMMIO, LLC 122   2020-07-26   
603-600 1 Manchester NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-01-02   
603-600 2 Manchester NH   624H ONVOY SPECTRUM, LLC 122   2020-10-22   
603-600 3 Manchester NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2020-10-30   
603-600 4 Manchester NH   637E ONVOY, LLC - NH 122   2021-01-02   
603-600 5 Manchester NH   637E ONVOY, LLC - NH 122   2020-12-04   
603-600 6 Manchester NH   637E ONVOY, LLC - NH 122   2020-10-15   
603-600 7 Manchester NH   637E ONVOY, LLC - NH 122   2020-11-01   
603-600 8 Manchester NH   637E ONVOY, LLC - NH 122   2021-02-03   
603-600 9 Manchester NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2021-01-09   
603-601 A Hampton NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-601 0 Hampton NH   829J PAETEC ITEL, LLC 122   2001-04-09   
603-601 1 Hampton NH   829J PAETEC ITEL, LLC 122   2004-02-21   
603-601 2 Hampton NH   318J COMCAST IP PHONE, LLC 122   2002-08-05   
603-601 3 Hampton NH   829J PAETEC ITEL, LLC 122   2011-02-23   
603-601 4 Hampton NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-05   
603-601 5 Hampton NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2013-01-14   
603-601 6 Hampton NH   318J COMCAST IP PHONE, LLC 122   2006-09-09   
603-601 7 Hampton NH   318J COMCAST IP PHONE, LLC 122   2011-06-03   
603-601 8 Hampton NH   318J COMCAST IP PHONE, LLC 122   2013-07-08   
603-601 9 Hampton NH   073H TELNYX LLC 122   2022-10-23   
603-602 A Rochester NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-602 0 Rochester NH   637E ONVOY, LLC - NH 122   2022-08-19   
603-602 1 Rochester NH   637E ONVOY, LLC - NH 122   2022-08-19   
603-602 2 Rochester NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2021-02-08   
603-602 3 Rochester NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2021-02-08   
603-602 4 Rochester NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2021-02-08   
603-602 5 Rochester NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2021-02-05   
603-602 6 Rochester NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2021-02-05   
603-602 7 Rochester NH   637E ONVOY, LLC - NH 122   2021-05-07   
603-602 8 Rochester NH   637E ONVOY, LLC - NH 122   2022-08-19   
603-602 9 Rochester NH   637E ONVOY, LLC - NH 122   2022-08-19   
603-604 A Rye Beach NH RYBHNHCEPS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-604 0 Rye Beach NH   073H TELNYX LLC 122   2024-07-04   
603-604 4 Rye Beach NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2024-09-13   
603-604 6 Rye Beach NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-06-20   
603-605 A Dover NH MNCHNHBODS0  927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122      
603-605 0 Dover NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2017-07-21   
603-605 1 Dover NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2017-01-30   
603-605 3 Dover NH   7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2018-08-28   
603-605 4 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2019-12-13   
603-605 5 Dover NH   6386 BELL ATLANTIC MOBILE, INC 122   2020-08-30   
603-605 6 Dover NH   318J COMCAST IP PHONE, LLC 122   2019-03-20   
603-605 7 Dover NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2021-07-02   
603-605 8 Dover NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2017-09-14   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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