Local Calling Guide

Area code/prefix search

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

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-815 A Durham NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-815 0 Durham NH   8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2008-02-11   
603-815 2 Durham NH   6386 BELL ATLANTIC NYNEX MOBILE 122   2017-07-11   
603-815 4 Durham NH   4112 COMCAST PHONE OF NEW HAMPSHIRE, LLC - NH 122   2015-01-12   
603-815 7 Durham NH   7575 CENTURYLINK COMMUNICATIONS LLC 122   2017-06-14   
603-815 8 Durham NH   6386 BELL ATLANTIC NYNEX MOBILE 122   2020-04-30   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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