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: WLWLWA01DS0

Remotes:

Switch Switch name Switch type
MLTNOR56RS0  MILTON  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
509-394 A Touchet WA 9638 QWEST CORPORATION 676      
509-522 A Walla Walla WA 9638 QWEST CORPORATION 676      
509-524 A Walla Walla WA 9638 QWEST CORPORATION 676      
509-525 A Walla Walla WA 9638 QWEST CORPORATION 676      
509-526 A Walla Walla WA 9638 QWEST CORPORATION 676      
509-527 A Walla Walla WA 9638 QWEST CORPORATION 676      
509-529 A Walla Walla WA 9638 QWEST CORPORATION 676      
509-897 A Walla Walla WA 9638 QWEST CORPORATION 676      
541-558 A Stateline OR 9638 QWEST CORPORATION 676      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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