Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 286

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-286 A Brea CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
657-286 0 Brea CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2015-12-03   
657-286 1 Brea CA   649C ONVOY, LLC - CA 730   2016-01-21   
657-286 2 Brea CA   649C ONVOY, LLC - CA 730   2016-01-21   
657-286 3 Brea CA   649C ONVOY, LLC - CA 730   2016-02-24   
657-286 4 Brea CA   649C ONVOY, LLC - CA 730   2016-02-24   
657-286 5 Brea CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2016-04-02   
657-286 6 Brea CA   649C ONVOY, LLC - CA 730   2016-04-08   
657-286 7 Brea CA   649C ONVOY, LLC - CA 730   2016-04-08   
657-286 8 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-10-26   
657-286 9 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2015-10-26   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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