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: 966

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-966 A Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672      
503-966 0 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2020-11-10   
503-966 1 Westport OR PTLDOR69UMD  076F BANDWIDTH.COM CLEC, LLC - OR 672   2015-11-14   
503-966 2 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2016-04-23   
503-966 3 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2016-04-18   
503-966 4 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2016-04-18   
503-966 5 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2015-09-28   
503-966 6 Westport OR PTLDORWAXDX  508J CENTURYLINK COMMUNICATIONS, LLC 672   2014-02-19   
503-966 7 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2007-09-21   
503-966 8 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2016-04-23   
503-966 9 Westport OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2012-09-26   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.