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.

Bieber, CA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
530-294 A BIBRCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-294 0 BIBRCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-294 1 BIBRCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-294 5 BIBRCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-294 7 CHICCA01X5X  508J CENTURYLINK COMMUNICATIONS, LLC 724   2017-08-24   
530-294 9 BIBRCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.