Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 503 [Rate centres in NPA 503] [Dial plan for NPA 503]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-999 A Salem OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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