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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-531 A Los Angeles: DA 09 CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-04   
323-531 0 Los Angeles: DA 09 CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-11-14   
323-531 1 Los Angeles: DA 09 CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-11-14   
323-531 2 Los Angeles: DA 09 CA   516C AT&T CORP. 730   2013-10-11   
323-531 3 Los Angeles: DA 09 CA   7575 CENTURYLINK COMMUNICATIONS LLC 730   2014-04-09   
323-531 4 Los Angeles: DA 09 CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-04   
323-531 5 Los Angeles: DA 09 CA   649C ONVOY, LLC - CA 730   2014-09-14   
323-531 6 Los Angeles: DA 09 CA   6529 T-MOBILE USA, INC. 730   2015-06-20   
323-531 7 Los Angeles: DA 09 CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2014-03-23   
323-531 8 Los Angeles: DA 09 CA   6529 T-MOBILE USA, INC. 730   2015-06-20   
323-531 9 Los Angeles: DA 09 CA   516C AT&T CORP. 730   2014-07-14   

Last updated: Sat, 29 Jun 2019 02:32:58 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.