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: LSGTCAXFDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-357 A Los Gatos CA 2319 FRONTIER CALIFORNIA INC. 722      
408-357 1 Los Gatos CA 2319 FRONTIER CALIFORNIA INC. 722      
408-357 5 Los Gatos CA 2319 FRONTIER CALIFORNIA INC. 722      
408-357 6 Los Gatos CA 2319 FRONTIER CALIFORNIA INC. 722      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.