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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-300 A Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2024-01-23   
657-300 0 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-05-31   
657-300 1 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 2 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 3 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-05-31   
657-300 4 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 5 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 6 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 7 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 8 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   
657-300 9 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2012-07-05   

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

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