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: 274

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-274 A Los Angeles: DA 03 CA LSANCA03DS3  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
323-274 0 Los Angeles: DA 03 CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2005-09-23   
323-274 1 Los Angeles: DA 03 CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2005-09-29   
323-274 2 Los Angeles: DA 03 CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2004-09-02   
323-274 3 Los Angeles: DA 03 CA LSANCA03DS3  7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 730      
323-274 4 Los Angeles: DA 03 CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2012-08-18   
323-274 5 Los Angeles: DA 03 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-08-01   
323-274 6 Los Angeles: DA 03 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-08-10   
323-274 7 Los Angeles: DA 03 CA   145J TERRA NOVA TELECOM INC. 730   2022-10-03   
323-274 8 Los Angeles: DA 03 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-08-10   
323-274 9 Los Angeles: DA 03 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2006-10-26   

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

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