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: 531

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-531 A Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
657-531 0 Huntington Beach CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-11-28   
657-531 1 Huntington Beach CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-11-28   
657-531 2 Huntington Beach CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-11-28   
657-531 3 Huntington Beach CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-11-28   
657-531 4 Huntington Beach CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2021-11-28   
657-531 5 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2021-12-02   
657-531 6 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2021-12-02   
657-531 7 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2021-12-02   
657-531 8 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-11-27   
657-531 9 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2021-11-27   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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