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: 866

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-866 A Yorba Linda CA LSANCAJWIMD  965H FRACTEL, LLC 730      
657-866 0 Yorba Linda CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2020-11-16   
657-866 1 Yorba Linda CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2020-11-16   
657-866 2 Yorba Linda CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-05-08   
657-866 3 Yorba Linda CA   649C ONVOY, LLC - CA 730   2021-06-06   
657-866 4 Yorba Linda CA   649C ONVOY, LLC - CA 730   2021-06-06   
657-866 5 Yorba Linda CA   649C ONVOY, LLC - CA 730   2021-06-06   
657-866 6 Yorba Linda CA   965H FRACTEL, LLC 730   2020-11-15   
657-866 7 Yorba Linda CA   649C ONVOY, LLC - CA 730   2021-06-06   
657-866 8 Yorba Linda CA   624H ONVOY SPECTRUM, LLC 730   2021-07-22   
657-866 9 Yorba Linda CA   649C ONVOY, LLC - CA 730   2021-08-13   

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

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