Local Calling Guide

Area code/prefix search

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NPA: 810 [Rate centres in NPA 810] [Dial plan for NPA 810]

NXX: 312

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-312 A Brighton MI CMPTMIIFCM0  9748 AMERICAN MESSAGING SERVICES, LLC 340      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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