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
603-295 A Durham NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122      

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

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