Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 509 [Rate centres in NPA 509] [Dial plan for NPA 509]

NXX: 488

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-488 A Othello WA OTHEWA01DS0  9638 QWEST CORPORATION 676      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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