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: 657

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-657 A Manchester NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-657 0 Manchester NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-03-03   
603-657 1 Manchester NH   829J PAETEC ITEL, LLC 122   2006-11-06   
603-657 2 Manchester NH   829J PAETEC ITEL, LLC 122   2006-01-16   
603-657 3 Manchester NH   829J PAETEC ITEL, LLC 122   2006-01-17   
603-657 4 Manchester NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-06-05   
603-657 5 Manchester NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-07-03   
603-657 6 Manchester NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-09-01   
603-657 7 Manchester NH   829J PAETEC ITEL, LLC 122      
603-657 8 Manchester NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-11-03   
603-657 9 Manchester NH   829J PAETEC ITEL, LLC 122      

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

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