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: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 218

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-218 A Ben Lomond CA SNJSCA02DS4  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
831-218 0 Ben Lomond CA SNJSCA02DS4  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
831-218 1 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2006-09-11   
831-218 2 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-05-13   
831-218 3 Ben Lomond CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-05-19   
831-218 4 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2009-10-19   
831-218 5 Ben Lomond CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-08-28   
831-218 6 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-31   
831-218 7 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-05-13   
831-218 8 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-31   
831-218 9 Ben Lomond CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-04-23   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.