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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-428 A Santa Cruz CA SNTDCAIKCM0  6664 SPRINT SPECTRUM L.P. 722      
831-428 0 Santa Cruz CA   3662 PACIFIC CENTREX SERVICES, INC. - CA 722   2006-12-01   
831-428 1 Santa Cruz CA   6664 SPRINT SPECTRUM L.P. 722   2007-09-18   
831-428 2 Santa Cruz CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2005-07-11   
831-428 3 Santa Cruz CA   6664 SPRINT SPECTRUM L.P. 722   2007-09-18   
831-428 4 Santa Cruz CA   6664 SPRINT SPECTRUM L.P. 722   2012-07-27   
831-428 5 Santa Cruz CA   6664 SPRINT SPECTRUM L.P. 722      
831-428 6 Santa Cruz CA   6664 SPRINT SPECTRUM L.P. 722   2012-07-27   
831-428 7 Santa Cruz CA   7575 CENTURYLINK COMMUNICATIONS LLC 722   2014-04-09   
831-428 8 Santa Cruz CA   649C ONVOY, LLC - CA 722   2013-03-29   
831-428 9 Santa Cruz CA   6664 SPRINT SPECTRUM L.P. 722      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.