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.

OCN: 483H NATIVE NETWORK, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
360-383 1 Whatcom County WA   674   2018-05-28   
509-317 5 Yakima WA   676   2016-01-21   
509-722 0 Chewelah WA   676   2016-12-04   
509-818 A Spokane WA SPKNWAOBX0Y  676      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.