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
425-546 A Bellevue WA 732J NUSO, LLC 674      
425-546 3 Bellevue WA 732J NUSO, LLC 674   2023-03-14   
564-207 2 Tenino WA 732J NUSO, LLC 674   2024-10-28   
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, 05 Apr 2025 03:03:23 UTC

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