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: 636

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-636 A Creston WA CETNWAXXRS0  2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-636 1 Creston WA   483E ONVOY, LLC - WA 676   2016-02-23   
509-636 2 Creston WA   2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-636 6 Creston WA   483E ONVOY, LLC - WA 676   2021-06-26   
509-636 7 Creston WA   483E ONVOY, LLC - WA 676   2008-09-06   
509-636 8 Creston WA   483E ONVOY, LLC - WA 676   2011-07-31   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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