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
206-594 A Seattle WA 478J NUSO, LLC 674      
206-594 1 Seattle WA 478J NUSO, LLC 674   2020-06-20   
360-638 5 Kingston WA 478J NUSO, LLC 674   2020-12-12   
564-203 A Port Angeles WA 478J NUSO, LLC 674   2021-01-16   
564-203 1 Port Angeles WA 478J NUSO, LLC 674   2021-01-16   
564-207 A Tenino WA 478J NUSO, LLC 674   2021-05-20   
564-207 1 Tenino WA 478J NUSO, LLC 674   2021-05-20   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.