Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 530 [Rate centres in NPA 530] [Dial plan for NPA 530]

NXX: 831

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
530-831 A Portola CA CHICCA01XMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 724      
530-831 0 Portola CA   981E BANDWIDTH.COM CLEC, LLC - CA 724      
530-831 1 Portola CA   145J TERRA NOVA TELECOM INC. 724   2021-01-07   
530-831 2 Portola CA   981E BANDWIDTH.COM CLEC, LLC - CA 724      
530-831 3 Portola CA   649C ONVOY, LLC - CA 724      
530-831 4 Portola CA   624H ONVOY SPECTRUM, LLC 724   2023-12-16   
530-831 5 Portola CA   516C AT&T CORP. 724   2025-01-15   
530-831 6 Portola CA   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 724   2012-11-12   
530-831 8 Portola CA   649C ONVOY, LLC - CA 724   2021-04-02   
530-831 9 Portola CA   939H COMMIO, LLC 724   2022-12-01   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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