Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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OCN: 483E ONVOY, LLC - WA

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
564-676 4 Oak Harbor WA STTLWAWBDS1  674   2021-11-13   
564-777 5 Castle Rock WA PTLDORWADS2  672   2021-06-26   
564-777 6 Castle Rock WA PTLDORWADS2  672   2021-06-26   
564-888 5 Vancouver WA PTLDORWADS2  672   2019-07-08   
564-888 6 Vancouver WA PTLDORWADS2  672   2019-07-08   
564-999 6 Olympia WA STTLWAWBDS1  674   2020-08-06   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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