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: 318

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-318 A Los Angeles: DA 05 CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730      
323-318 0 Los Angeles: DA 05 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-04-16   
323-318 1 Los Angeles: DA 05 CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730      
323-318 2 Los Angeles: DA 05 CA MTPKCACG1MD  776C CHARTER FIBERLINK CA-CCO, LLC - CA 730   2005-08-28   
323-318 3 Los Angeles: DA 05 CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2015-04-19   
323-318 4 Los Angeles: DA 05 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2005-09-01   
323-318 5 Los Angeles: DA 05 CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2024-07-08   
323-318 6 Los Angeles: DA 05 CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2005-09-15   
323-318 7 Los Angeles: DA 05 CA BLTNCAADPS2  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 730   2005-09-15   
323-318 8 Los Angeles: DA 05 CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730      
323-318 9 Los Angeles: DA 05 CA ANHMCANG2MD  4733 PAETEC COMMUNICATIONS, INC. - CA 730      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.