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: 451

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-451 A Los Angeles: DA 09 CA LSANCAJWDS8  7453 U.S. TELEPACIFIC CORP. - CA 730      
323-451 0 Los Angeles: DA 09 CA   8322 MPOWER COMMUNICATIONS CORP - CA 730      
323-451 1 Los Angeles: DA 09 CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2012-04-19   
323-451 2 Los Angeles: DA 09 CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2011-01-03   
323-451 3 Los Angeles: DA 09 CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2009-07-17   
323-451 4 Los Angeles: DA 09 CA   7453 U.S. TELEPACIFIC CORP. - CA 730      
323-451 5 Los Angeles: DA 09 CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-06-07   
323-451 6 Los Angeles: DA 09 CA   7453 U.S. TELEPACIFIC CORP. - CA 730      
323-451 7 Los Angeles: DA 09 CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2012-03-10   
323-451 8 Los Angeles: DA 09 CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2010-07-16   
323-451 9 Los Angeles: DA 09 CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-06-07   

Last updated: Sun, 29 Nov 2020 13:13:58 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.