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
831-741 A Castroville CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-741 1 Castroville CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 736   2016-03-05   
831-741 2 Castroville CA   649C ONVOY, LLC - CA 736   2019-07-26   
831-741 3 Castroville CA   649C ONVOY, LLC - CA 736   2019-07-26   
831-741 4 Castroville CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736   2012-01-08   
831-741 6 Castroville CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2008-03-15   
831-741 7 Castroville CA   7575 CENTURYLINK COMMUNICATIONS LLC 736   2015-11-09   
831-741 9 Castroville CA   6010 NEW CINGULAR WIRELESS PCS, LLC 736   2018-11-10   

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.