Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 389

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-389 A Pinnacles CA PNCLCAXFDS0  2346 PINNACLES TEL. CO. 736      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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