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: 499

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-499 A Los Angeles: DA 14 CA ELMNCAFIGT1  6529 T-MOBILE USA, INC. 730      
323-499 0 Los Angeles: DA 14 CA   899D METROPCS NETWORKS, LLC 730   2018-11-04   
323-499 1 Los Angeles: DA 14 CA   576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2015-10-26   
323-499 2 Los Angeles: DA 14 CA   4733 PAETEC COMMUNICATIONS, INC. - CA 730   2015-10-24   
323-499 3 Los Angeles: DA 14 CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2016-10-23   
323-499 4 Los Angeles: DA 14 CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2015-12-24   
323-499 5 Los Angeles: DA 14 CA   6529 T-MOBILE USA, INC. 730   2015-12-11   
323-499 6 Los Angeles: DA 14 CA   6529 T-MOBILE USA, INC. 730   2015-12-11   
323-499 7 Los Angeles: DA 14 CA   6529 T-MOBILE USA, INC. 730   2015-12-11   
323-499 8 Los Angeles: DA 14 CA   6529 T-MOBILE USA, INC. 730   2015-12-11   
323-499 9 Los Angeles: DA 14 CA   6529 T-MOBILE USA, INC. 730   2015-12-11   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.