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.

NPA: 760 [Rate centres in NPA 760] [Dial plan for NPA 760]

NXX: 306

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
760-306 A Boron CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730      
760-306 1 Boron CA   624H ONVOY SPECTRUM, LLC 730   2021-12-13   
760-306 3 Boron CA   981E BANDWIDTH.COM CLEC, LLC - CA 730   2010-08-28   
760-306 4 Boron CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2005-07-26   
760-306 5 Boron CA   649C ONVOY, LLC - CA 730   2012-12-30   
760-306 6 Boron CA   508J CENTURYLINK COMMUNICATIONS, LLC 730   2014-06-27   
760-306 7 Boron CA   624H ONVOY SPECTRUM, LLC 730   2021-12-13   
760-306 8 Boron CA   515J IP HORIZON LLC 730   2015-09-19   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.