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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Switch: STTLWAWB23Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
206-670 A Seattle WA 495J STRATUS NETWORKS 674      
206-670 1 Seattle WA 495J STRATUS NETWORKS 674   2021-05-07   
253-553 0 Auburn WA 495J STRATUS NETWORKS 674   2021-04-10   
360-251 4 Marysville WA 495J STRATUS NETWORKS 674   2021-04-10   
425-307 7 Kirkland WA 495J STRATUS NETWORKS 674   2021-04-10   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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