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: 971 [Rate centres in NPA 971] [Dial plan for NPA 971]

NXX: 350

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
971-350 A Portland OR PTLDORWADS2  750E ONVOY, LLC - OR 672      
971-350 0 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 1 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 2 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 3 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 4 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 5 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 6 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 7 Portland OR   750E ONVOY, LLC - OR 672   2017-10-19   
971-350 8 Portland OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2018-07-13   
971-350 9 Portland OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2018-07-13   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.