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: 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      
657-354 1 Fullerton CA LSANCAJW6MD  073H TELNYX LLC 730      
657-354 2 Fullerton CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730      
657-354 3 Fullerton CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730      
657-354 4 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730      
657-354 5 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730      
657-354 6 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730      
657-354 7 Fullerton CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730      
657-354 8 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730      
657-354 9 Fullerton CA TRNECAGBGT3  899D METROPCS NETWORKS, LLC 730      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.