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

NXX: 708

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-708 A Canterbury NH MNCHNHIE6MD  318J COMCAST IP PHONE LLC 122      
603-708 1 Canterbury NH MNCHNHIE6MD  318J COMCAST IP PHONE LLC 122   2005-04-11   
603-708 2 Canterbury NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2015-05-30   

Last updated: Fri, 23 Jul 2021 12:43:22 UTC

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