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: EKGVCAXGDS4

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
916-509 A Elk Grove CA 2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 726      
916-509 4 Elk Grove CA 2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 726   2007-11-19   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.