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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
603-575 9 Littleton NH   7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-576 A Orford NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-576 2 Orford NH   145J TERRA NOVA TELECOM INC. 122   2021-12-12   
603-576 4 Orford NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-577 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 0 Nashua NH   6386 BELL ATLANTIC MOBILE, INC 122   2015-05-01   
603-577 1 Nashua NH   318J COMCAST IP PHONE, LLC 122   2006-12-20   
603-577 2 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 3 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 4 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 5 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 6 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 7 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 8 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 9 Nashua NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-578 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-579 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-580 A Exeter NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-580 0 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2026-01-08   
603-580 1 Exeter NH   318J COMCAST IP PHONE, LLC 122      
603-580 2 Exeter NH   318J COMCAST IP PHONE, LLC 122      
603-580 3 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2022-08-29   
603-580 4 Exeter NH   318J COMCAST IP PHONE, LLC 122   2012-07-20   
603-580 5 Exeter NH   318J COMCAST IP PHONE, LLC 122      
603-580 6 Exeter NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122   2003-01-01   
603-580 7 Exeter NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122   2003-01-01   
603-580 8 Exeter NH   8468 FREEDOM RING COMMUNICATIONS, LLC 122   2003-01-06   
603-580 9 Exeter NH   829J PAETEC ITEL, LLC 122   2006-03-14   
603-581 A Laconia NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-581 0 Laconia NH   829J PAETEC ITEL, LLC 122      
603-581 1 Laconia NH   829J PAETEC ITEL, LLC 122   2004-11-28   
603-581 2 Laconia NH   829J PAETEC ITEL, LLC 122   2000-08-08   
603-581 3 Laconia NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-05-13   
603-581 4 Laconia NH   6386 BELL ATLANTIC MOBILE, INC 122   2007-12-14   
603-581 5 Laconia NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-01-14   
603-581 6 Laconia NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-03-03   
603-581 7 Laconia NH   829J PAETEC ITEL, LLC 122      
603-581 8 Laconia NH   6386 BELL ATLANTIC MOBILE, INC 122   2007-08-02   
603-581 9 Laconia NH   6386 BELL ATLANTIC MOBILE, INC 122   2007-08-02   
603-582 A Merrimack NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-583 A Exeter NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-583 0 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2010-05-03   
603-583 1 Exeter NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2010-07-06   
603-583 2 Exeter NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2011-02-10   
603-583 3 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2009-06-01   
603-583 4 Exeter NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-583 5 Exeter NH   318J COMCAST IP PHONE, LLC 122   2009-09-09   
603-583 6 Exeter NH   5562 METROPCS, INC. 122   2011-03-25   
603-583 7 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2011-12-04   
603-583 8 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2013-06-30   
603-583 9 Exeter NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-12-08   
603-584 A Concord NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-584 0 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-09-23   
603-584 1 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-09-23   
603-584 2 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-09-23   
603-584 3 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-11-04   
603-584 4 Concord NH   637E ONVOY, LLC - NH 122   2021-11-13   
603-584 5 Concord NH   314C IDT AMERICA, CORP. - NH 122   2021-11-15   
603-584 6 Concord NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2021-12-25   
603-584 7 Concord NH   927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2021-10-06   
603-584 8 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-09-23   
603-584 9 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2021-09-02   
603-585 A Fitzwilliam NH FTZWNHUTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 0 Fitzwilliam NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-10   
603-585 1 Fitzwilliam NH   793K TWC IP ENABLED SERVICES, LLC 122   2024-01-01   
603-585 2 Fitzwilliam NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 3 Fitzwilliam NH   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   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-585 6 Fitzwilliam NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 7 Fitzwilliam NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-585 9 Fitzwilliam NH   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   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-15   
603-586 4 Jefferson NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-586 5 Jefferson NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2003-03-23   
603-586 6 Jefferson NH   793K TWC IP ENABLED SERVICES, LLC 122   2012-10-02   
603-586 7 Jefferson NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-586 9 Jefferson NH   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   318J COMCAST IP PHONE, LLC 122   2000-07-01   
603-587 1 Candia NH   6386 BELL ATLANTIC MOBILE, INC 122   2019-03-14   
603-587 2 Candia NH   318J COMCAST IP PHONE, LLC 122   2012-12-10   
603-587 3 Candia NH   6386 BELL ATLANTIC MOBILE, INC 122   2023-09-06   
603-587 4 Candia NH   6386 BELL ATLANTIC MOBILE, INC 122   2026-01-15   
603-587 7 Candia NH   073H TELNYX LLC 122   2023-10-06   
603-587 8 Candia NH   829J PAETEC ITEL, LLC 122   2002-10-14   
603-587 9 Candia NH   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   3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 2 Antrim NH   3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 3 Antrim NH   3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 4 Antrim NH   3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 6 Antrim NH   3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-588 8 Antrim NH   3320 MERRIMACK CO. TELEPHONE CO., DBA CONTOOCOOK VALLEY 122      
603-589 A Nashua NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-589 0 Nashua NH   829J PAETEC ITEL, LLC 122      
603-589 1 Nashua NH   829J PAETEC ITEL, LLC 122      
603-589 2 Nashua NH   829J PAETEC ITEL, LLC 122      
603-589 3 Nashua NH   829J PAETEC ITEL, LLC 122      

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

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