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: PASCWA01DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
509-542 A Pasco WA 9638 QWEST CORPORATION 676      
509-543 A Pasco WA 9638 QWEST CORPORATION 676      
509-544 A Pasco WA 9638 QWEST CORPORATION 676      
509-545 A Pasco WA 9638 QWEST CORPORATION 676      
509-546 A Pasco WA 9638 QWEST CORPORATION 676      
509-547 A Pasco WA 9638 QWEST CORPORATION 676      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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