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: 7340 XO WASHINGTON, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
206-792 A Seattle WA STTNWAHODS6  674      
206-792 0 Seattle WA STTNWAHODS6  674      
206-792 1 Seattle WA STTNWAHODS6  674      
206-792 2 Seattle WA STTNWAHODS6  674      
206-792 3 Seattle WA STTNWAHODS6  674      
206-792 4 Seattle WA STTNWAHODS6  674      
425-279 A Bellevue WA STTNWAHODS6  674      
425-279 0 Bellevue WA STTNWAHODS6  674      
425-279 1 Bellevue WA STTNWAHODS6  674      
425-279 2 Bellevue WA STTNWAHODS6  674      
509-435 A Spokane WA SPKNWADZDS2  676      
509-435 0 Spokane WA SPKNWADZDS2  676      
509-435 4 Spokane WA SPKNWADZDS2  676      

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

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