Local Calling Guide

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NPA: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

NXX: 819

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-819 A Plaistow NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-819 0 Plaistow NH   9827 OTEL TELEKOM, INC. - NH 122   2005-01-24   
603-819 1 Plaistow NH   6386 BELL ATLANTIC MOBILE, INC 122   2005-04-01   
603-819 3 Plaistow NH   6386 BELL ATLANTIC MOBILE, INC 122   2006-09-01   
603-819 4 Plaistow NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-819 5 Plaistow NH   4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-04-28   
603-819 6 Plaistow NH   6386 BELL ATLANTIC MOBILE, INC 122   2008-10-03   
603-819 8 Plaistow NH   6386 BELL ATLANTIC MOBILE, INC 122   2004-04-01   
603-819 9 Plaistow NH   6386 BELL ATLANTIC MOBILE, INC 122   2003-06-03   

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

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