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.

NPA: 503 [Rate centres in NPA 503] [Dial plan for NPA 503]

NXX: 534

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-534 A Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 0 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 1 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 2 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 3 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 4 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 5 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 6 Clackamas OR   750E ONVOY, LLC - OR 672   2009-10-02   
503-534 7 Clackamas OR LKOSOR62DS0  9638 QWEST CORPORATION 672      
503-534 8 Clackamas OR PTLGORIA7MD  3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672      
503-534 9 Clackamas OR PTLGORIA7MD  3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.