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: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
530-438 A Maxwell CA MXWLCAXFRS0  3402 CITIZENS TELECOMM DBA FRONTIER COMM GOLDEN STATE 726      
530-438 0 Maxwell CA   3402 CITIZENS TELECOMM DBA FRONTIER COMM GOLDEN STATE 726      
530-438 2 Maxwell CA   3402 CITIZENS TELECOMM DBA FRONTIER COMM GOLDEN STATE 726      
530-438 4 Maxwell CA   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 726   2015-07-17   
530-438 6 Maxwell CA   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 726   2023-02-01   
530-438 7 Maxwell CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 726   2015-03-19   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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