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: 646

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-646 A Washtucna WA WSHTWAXARS0  2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-646 0 Washtucna WA   145J TERRA NOVA TELECOM INC. 676   2025-07-24   
509-646 2 Washtucna WA   483E ONVOY, LLC - WA 676   2016-02-12   
509-646 3 Washtucna WA   2408 CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 676      
509-646 4 Washtucna WA   483E ONVOY, LLC - WA 676   2021-06-27   
509-646 5 Washtucna WA   483E ONVOY, LLC - WA 676   2021-11-20   
509-646 6 Washtucna WA   6121 LEVEL 3 COMMUNICATIONS, LLC - WA 676   2015-01-26   
509-646 7 Washtucna WA   483E ONVOY, LLC - WA 676   2011-08-19   
509-646 8 Washtucna WA   483E ONVOY, LLC - WA 676   2008-10-24   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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