Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 837 [Rate centres in NPA 837] [Dial plan for NPA 837]

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
837-776 A Redding CA   649C ONVOY, LLC - CA 724   2026-10-25   
837-776 7 Redding CA   649C ONVOY, LLC - CA 724   2026-10-25   
837-777 A Truckee CA   252F WIDE VOICE, LLC - CA 726   2026-10-24   
837-777 7 Truckee CA   252F WIDE VOICE, LLC - CA 726   2026-10-24   
837-777 8 Truckee CA   252F WIDE VOICE, LLC - CA 726   2026-10-24   
837-888 A Shingle Springs CA   649C ONVOY, LLC - CA 726   2026-10-25   
837-888 8 Shingle Springs CA   649C ONVOY, LLC - CA 726   2026-10-25   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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