Local Calling Guide

Area code/prefix search

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

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-637 A Bedford NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-637 0 Bedford NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-04-08   
603-637 1 Bedford NH   829J PAETEC ITEL, LLC 122   2000-05-24   
603-637 2 Bedford NH   829J PAETEC ITEL, LLC 122   2008-07-03   
603-637 4 Bedford NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2013-02-28   
603-637 8 Bedford NH   6386 BELL ATLANTIC MOBILE, INC 122   2025-02-24   
603-637 9 Bedford NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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