Local Calling Guide

Area code/prefix search

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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-240 A Lake Ann MI GDRPMIBQDS1  4632 TELNET WORLDWIDE, INC. 348   2004-05-20   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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