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-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
323-690 A Los Angeles: DA 11 CA 6529 T-MOBILE USA, INC. 730      
424-469 A Compton: Gardena DA CA 6529 T-MOBILE USA, INC. 730   2021-12-04   
657-523 A Garden Grove CA 6529 T-MOBILE USA, INC. 730   2021-11-27   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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