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: 679

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-679 A Chualar CA CHLRCA11RS0  9740 PACIFIC BELL 736      
831-679 0 Chualar CA   9740 PACIFIC BELL 736      
831-679 1 Chualar CA   9740 PACIFIC BELL 736      
831-679 2 Chualar CA   9740 PACIFIC BELL 736      
831-679 3 Chualar CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2005-07-26   
831-679 4 Chualar CA   649C ONVOY, LLC - CA 736   2017-04-27   
831-679 7 Chualar CA   9262 UTILITY TELECOM GROUP, LLC - CA 736   2006-06-14   
831-679 8 Chualar CA   145J TERRA NOVA TELECOM INC. 736   2021-01-12   
831-679 9 Chualar CA   776C CHARTER FIBERLINK CA-CCO, LLC - CA 736   2018-09-11   

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

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