Local Calling Guide

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

NXX: 354

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-354 A Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730      
657-354 0 Fullerton CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2017-06-13   
657-354 1 Fullerton CA LSANCAJW6MD  073H TELNYX LLC 730   2017-06-13   
657-354 2 Fullerton CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2022-09-15   
657-354 3 Fullerton CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2017-07-07   
657-354 4 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2018-06-27   
657-354 5 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2018-04-06   
657-354 6 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2018-04-06   
657-354 7 Fullerton CA   793K TWC IP ENABLED SERVICES, LLC 730   2017-08-25   
657-354 8 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2017-08-12   
657-354 9 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730   2017-06-12   

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

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