Local Calling Guide

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NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 237

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-237 A Huntington Beach CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-237 0 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-07-05   
657-237 1 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-08-08   
657-237 2 Huntington Beach CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-06-28   
657-237 3 Huntington Beach CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-08-17   
657-237 4 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-08-11   
657-237 5 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-08-28   
657-237 6 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-08-28   
657-237 7 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2014-09-20   
657-237 8 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2014-09-20   
657-237 9 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2014-09-10   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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