Local Calling Guide

Area code/prefix search

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

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
971-521 A Portland OR   750E ONVOY, LLC - OR 672   2025-10-26   
971-521 0 Portland OR   750E ONVOY, LLC - OR 672   2025-10-26   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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