Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

NXX: 903

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-903 A Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-903 0 Keene NH MNCHNHCO42Z  793K TWC IP ENABLED SERVICES, LLC 122   2005-06-24   
603-903 1 Keene NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2008-04-10   
603-903 2 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-08-01   
603-903 3 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2007-11-29   
603-903 4 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-08-01   
603-903 5 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-04-02   
603-903 6 Keene NH KEENNHWADS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2010-01-08   
603-903 7 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2010-08-01   
603-903 8 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2011-09-02   
603-903 9 Keene NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2011-03-04   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.