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: BLLVWASHDMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
206-847 A Seattle WA 732J NUSO, LLC 674      
206-847 1 Seattle WA 732J NUSO, LLC 674   2025-05-19   
206-847 2 Seattle WA 732J NUSO, LLC 674   2025-05-19   
206-847 3 Seattle WA 732J NUSO, LLC 674   2025-05-19   
206-881 7 Seattle WA 732J NUSO, LLC 674   2026-06-07   
206-881 8 Seattle WA 732J NUSO, LLC 674   2026-06-07   
425-546 A Bellevue WA 732J NUSO, LLC 674      
425-546 3 Bellevue WA 732J NUSO, LLC 674   2023-03-14   
425-546 8 Bellevue WA 732J NUSO, LLC 674   2025-07-10   
425-565 7 Everett WA 732J NUSO, LLC 674   2025-07-10   
564-243 2 Whatcom County WA 732J NUSO, LLC 674   2024-06-17   
564-260 0 Mount Vernon WA 732J NUSO, LLC 674   2024-11-18   
564-565 9 Whatcom County WA 732J NUSO, LLC 674   2024-06-17   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.