Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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      
657-237 1 Huntington Beach CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-237 2 Huntington Beach CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-237 3 Huntington Beach CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
657-237 4 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
657-237 5 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
657-237 6 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
657-237 7 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730      
657-237 8 Huntington Beach CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730      
657-237 9 Huntington Beach CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.