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: PTLDOR11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
503-251 A Portland OR 9638 QWEST CORPORATION 672      
503-252 A Portland OR 9638 QWEST CORPORATION 672      
503-253 A Portland OR 9638 QWEST CORPORATION 672      
503-254 A Portland OR 9638 QWEST CORPORATION 672      
503-255 A Portland OR 9638 QWEST CORPORATION 672      
503-256 A Portland OR 9638 QWEST CORPORATION 672      
503-257 A Portland OR 9638 QWEST CORPORATION 672      
503-258 A Portland OR 9638 QWEST CORPORATION 672      
503-261 A Portland OR 9638 QWEST CORPORATION 672      
503-262 A Portland OR 9638 QWEST CORPORATION 672      
503-401 A Portland OR 9638 QWEST CORPORATION 672      
503-408 A Portland OR 9638 QWEST CORPORATION 672      

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

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