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.

Switch: FRSNCA01TMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-973 A Dos Palos CA 939H COMMIO, LLC 728      
350-203 A Dos Palos CA 939H COMMIO, LLC 728   2024-02-23   
559-219 A Tipton CA 939H COMMIO, LLC 728      
559-778 A Fresno CA 939H COMMIO, LLC 728   2024-02-25   
559-878 A Fresno CA 939H COMMIO, LLC 728      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.