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: 323 [Rate centres in NPA 323] [Dial plan for NPA 323]

NXX: 335

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-335 A Los Angeles: DA 02 CA IRVNCASM1MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 730      
323-335 0 Los Angeles: DA 02 CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2010-02-04   
323-335 1 Los Angeles: DA 02 CA CYCMCALLCM5  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-07-08   
323-335 2 Los Angeles: DA 02 CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2024-07-08   
323-335 3 Los Angeles: DA 02 CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2005-06-04   
323-335 4 Los Angeles: DA 02 CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-04-12   
323-335 5 Los Angeles: DA 02 CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2020-06-15   
323-335 6 Los Angeles: DA 02 CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-04-12   
323-335 7 Los Angeles: DA 02 CA LSANCARC80Z  9262 UTILITY TELECOM GROUP, LLC - CA 730   2006-05-25   
323-335 8 Los Angeles: DA 02 CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-04-12   
323-335 9 Los Angeles: DA 02 CA TRNECAGB7MD  899D METROPCS NETWORKS, LLC 730   2007-04-12   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.