Local Calling Guide

Area code/prefix search

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NPA: 503 [Rate centres in NPA 503] [Dial plan for NPA 503]

NXX: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-510 A Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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