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.

Fall River Mills, CA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
530-336 A FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-336 0 FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-336 1   145J TERRA NOVA TELECOM INC. 724   2025-05-15   
530-336 2 RDNGCA025MD  9262 UTILITY TELECOM GROUP, LLC - CA 724   2018-01-23   
530-336 3 FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-336 4 CHICCA017MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 724   2017-08-23   
530-336 5 FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-336 6 FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-336 7 FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      
530-336 8 CHICCACW8MD  965H FRACTEL, LLC 724   2020-11-27   
530-336 9 FRMLCAXFDS0  2308 CITIZENS TELECOM CA. DBA FRONTIER COM OF CA 724      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.