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: 615

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
323-615 A Los Angeles: DA 09 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
323-615 0 Los Angeles: DA 09 CA   793K TWC IP ENABLED SERVICES, LLC 730   2015-10-20   
323-615 1 Los Angeles: DA 09 CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2016-02-08   
323-615 2 Los Angeles: DA 09 CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2016-02-08   
323-615 3 Los Angeles: DA 09 CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2016-02-08   
323-615 4 Los Angeles: DA 09 CA   793K TWC IP ENABLED SERVICES, LLC 730   2016-02-14   
323-615 5 Los Angeles: DA 09 CA   829J PAETEC ITEL, LLC 730   2016-03-24   
323-615 6 Los Angeles: DA 09 CA   793K TWC IP ENABLED SERVICES, LLC 730   2016-06-16   
323-615 7 Los Angeles: DA 09 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2016-06-30   
323-615 8 Los Angeles: DA 09 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2016-06-30   
323-615 9 Los Angeles: DA 09 CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2015-10-17   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.