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: 729

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-729 A Los Angeles: DA 05 CA LSANCA34DS1  9740 PACIFIC BELL 730      
323-729 0 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 1 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 2 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 3 Los Angeles: DA 05 CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2010-08-01   
323-729 4 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 5 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 6 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 7 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      
323-729 8 Los Angeles: DA 05 CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2019-10-23   
323-729 9 Los Angeles: DA 05 CA   9740 PACIFIC BELL 730      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.