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: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
509-400 A Mattawa WA KNWCWABB1MD  6270 UNITED STATES CELLULAR - WA 676      
509-400 0 Mattawa WA KNWCWABB1MD  6270 UNITED STATES CELLULAR - WA 676   2018-09-14   
509-400 1 Mattawa WA KNWCWABB1MD  6270 UNITED STATES CELLULAR - WA 676   2019-09-16   
509-400 2 Mattawa WA KNWCWABB1MD  6270 UNITED STATES CELLULAR - WA 676   2020-05-12   
509-400 4 Mattawa WA SNSDWAXXHMD  483E ONVOY, LLC - WA 676   2020-07-20   
509-400 5 Mattawa WA SPKNWA01XXX  483E ONVOY, LLC - WA 676   2020-10-23   
509-400 6 Mattawa WA SPKNWA01XXX  483E ONVOY, LLC - WA 676   2020-10-23   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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