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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: STTLWAWB20Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
206-230 1 Seattle WA 478J NUSO, LLC 674   2024-01-03   
206-230 2 Seattle WA 478J NUSO, LLC 674   2024-01-03   
206-493 4 Seattle WA 478J NUSO, LLC 674   2024-04-08   
206-493 6 Seattle WA 478J NUSO, LLC 674   2024-04-08   
206-506 2 Seattle WA 478J NUSO, LLC 674   2024-07-01   
206-516 1 Seattle WA 478J NUSO, LLC 674   2024-07-01   
206-594 A Seattle WA 478J NUSO, LLC 674      
206-594 1 Seattle WA 478J NUSO, LLC 674   2020-06-20   
206-925 0 Seattle WA 478J NUSO, LLC 674   2024-07-01   
206-925 2 Seattle WA 478J NUSO, LLC 674   2024-07-01   
360-638 5 Kingston WA 478J NUSO, LLC 674   2020-12-12   
564-203 A Port Angeles WA 478J NUSO, LLC 674      
564-203 1 Port Angeles WA 478J NUSO, LLC 674   2021-01-16   
564-207 A Tenino WA 478J NUSO, LLC 674      
564-207 1 Tenino WA 478J NUSO, LLC 674   2021-05-20   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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