Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 323 [Rate centres in NPA 323] [Dial plan for NPA 323]

NXX: 451

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-451 A Los Angeles: DA 09 CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-451 0 Los Angeles: DA 09 CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-451 1 Los Angeles: DA 09 CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2012-04-19   
323-451 2 Los Angeles: DA 09 CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-01-03   
323-451 3 Los Angeles: DA 09 CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2009-07-17   
323-451 4 Los Angeles: DA 09 CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-451 5 Los Angeles: DA 09 CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-06-07   
323-451 6 Los Angeles: DA 09 CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-451 7 Los Angeles: DA 09 CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2012-03-10   
323-451 8 Los Angeles: DA 09 CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2010-07-16   
323-451 9 Los Angeles: DA 09 CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-06-07   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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