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: PTLDOR18DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
503-771 A Portland OR 9638 QWEST CORPORATION 672      
503-772 A Portland OR 9638 QWEST CORPORATION 672      
503-774 A Portland OR 9638 QWEST CORPORATION 672      
503-775 A Portland OR 9638 QWEST CORPORATION 672      
503-777 A Portland OR 9638 QWEST CORPORATION 672      
503-788 A Portland OR 9638 QWEST CORPORATION 672      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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