Local Calling Guide

Area code/prefix search

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NPA: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-604 A Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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