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: 660

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-660 A Ritzville WA MLWDWAAA2MD  6010 NEW CINGULAR WIRELESS PCS, LLC 676      
509-660 0 Ritzville WA MLWDWAAA2MD  6010 NEW CINGULAR WIRELESS PCS, LLC 676      
509-660 1 Ritzville WA   145J TERRA NOVA TELECOM INC. 676   2025-07-19   
509-660 2 Ritzville WA SPKNWA01XXX  483E ONVOY, LLC - WA 676   2006-04-24   
509-660 3 Ritzville WA MLWDWAAA2MD  6010 NEW CINGULAR WIRELESS PCS, LLC 676      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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