Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 957

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-957 A Portsmouth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-957 0 Portsmouth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-957 1 Portsmouth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-957 2 Portsmouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2015-11-28   
603-957 3 Portsmouth NH DOVRNHTH8MD  2698 CTC COMMUNICATIONS CORP. - NH 122   2006-03-20   
603-957 4 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2008-09-24   
603-957 5 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2009-07-15   
603-957 6 Portsmouth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2011-06-19   
603-957 7 Portsmouth NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2011-06-19   
603-957 8 Portsmouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-07-03   
603-957 9 Portsmouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2017-02-17   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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