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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
603-421 0 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 1 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 2 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 3 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 4 Derry NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-421 5 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-421 6 Derry NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-10-02   
603-421 7 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-11-21   
603-421 8 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2012-10-12   
603-421 9 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 A Portsmouth NH PTMONHISDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 0 Portsmouth NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 1 Portsmouth NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 2 Portsmouth NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-03-29   
603-422 3 Portsmouth NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-03-29   
603-422 4 Portsmouth NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-11-22   
603-422 5 Portsmouth NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2011-11-22   
603-422 6 Portsmouth NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 7 Portsmouth NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 8 Portsmouth NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-422 9 Portsmouth NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 A Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 0 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 1 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 2 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 3 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 4 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 5 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 6 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 7 Merrimack NH   637E ONVOY, LLC - NH 122   2024-08-09   
603-423 8 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-423 9 Merrimack NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-424 A Merrimack NH MRMCNHYADS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 A Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 0 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 1 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 2 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 3 Derry NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-425 4 Derry NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-425 5 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 6 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 7 Derry NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-425 8 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2007-09-18   
603-425 9 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2009-08-01   
603-426 A Derry NH DRRYNHEBDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-426 0 Derry NH   145J TERRA NOVA TELECOM INC. 122   2024-08-07   
603-426 1 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2024-07-31   
603-426 2 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2024-09-11   
603-426 3 Derry NH   6386 BELL ATLANTIC MOBILE, INC 122   2025-02-18   
603-426 4 Derry NH   145J TERRA NOVA TELECOM INC. 122   2025-04-09   

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

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