Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 424 [Rate centres in NPA 424] [Dial plan for NPA 424]

NXX: 390

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
424-390 A Redondo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
424-390 0 Redondo CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2017-07-09   
424-390 1 Redondo CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2016-10-28   
424-390 2 Redondo CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2016-10-28   
424-390 3 Redondo CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2016-10-28   
424-390 4 Redondo CA   793K TWC IP ENABLED SERVICES, LLC 730   2016-10-31   
424-390 5 Redondo CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2017-03-17   
424-390 6 Redondo CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2018-02-24   
424-390 7 Redondo CA SNMNCAXPX3Z  649C ONVOY, LLC - CA 730   2017-06-10   
424-390 8 Redondo CA   793K TWC IP ENABLED SERVICES, LLC 730   2017-04-06   
424-390 9 Redondo CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2016-10-27   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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