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: 431

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
971-431 A Gresham OR PTLDOR69UMD  076F BANDWIDTH.COM CLEC, LLC - OR 672      
971-431 0 Gresham OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2022-09-04   
971-431 1 Gresham OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2022-09-04   
971-431 2 Gresham OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2022-09-04   
971-431 3 Gresham OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2022-09-04   
971-431 4 Gresham OR   076F BANDWIDTH.COM CLEC, LLC - OR 672   2022-09-04   
971-431 5 Gresham OR   750E ONVOY, LLC - OR 672   2024-02-04   
971-431 6 Gresham OR   6010 NEW CINGULAR WIRELESS PCS, LLC 672   2023-07-08   
971-431 7 Gresham OR   750E ONVOY, LLC - OR 672   2023-05-11   
971-431 8 Gresham OR   750E ONVOY, LLC - OR 672   2022-12-15   
971-431 9 Gresham OR   6010 NEW CINGULAR WIRELESS PCS, LLC 672   2023-01-21   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.