Local Calling Guide

Area code/prefix search

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

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
971-257 A Cloverdale OR   792K CHARTER IP ENABLED SERVICES, LLC 672      
971-257 0 Cloverdale OR   792K CHARTER IP ENABLED SERVICES, LLC 672      
971-257 1 Cloverdale OR   750E ONVOY, LLC - OR 672   2020-02-22   
971-257 2 Cloverdale OR   936F ASTOUND BROADBAND, LLC - OR 672   2017-12-04   
971-257 4 Cloverdale OR   750E ONVOY, LLC - OR 672   2021-03-05   
971-257 5 Cloverdale OR   750E ONVOY, LLC - OR 672   2018-12-06   
971-257 6 Cloverdale OR   750E ONVOY, LLC - OR 672   2020-08-14   
971-257 7 Cloverdale OR   508J CENTURYLINK COMMUNICATIONS, LLC 672   2013-11-27   
971-257 8 Cloverdale OR   750E ONVOY, LLC - OR 672   2020-08-14   
971-257 9 Cloverdale OR   750E ONVOY, LLC - OR 672   2021-03-05   

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

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