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: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-400 A Santa Cruz CA SNFCCAMKX3Y  597F VOIP INNOVATIONS, LLC 722      
831-400 0 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2017-05-13   
831-400 1 Santa Cruz CA SNFCCAMKX3Y  597F VOIP INNOVATIONS, LLC 722   2019-08-02   
831-400 2 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2018-04-09   
831-400 3 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2019-02-21   
831-400 4 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2017-05-13   
831-400 5 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2019-02-21   
831-400 6 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2018-05-28   
831-400 7 Santa Cruz CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2017-11-05   
831-400 8 Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2017-11-20   
831-400 9 Santa Cruz CA OKLECAZVGT0  6529 T-MOBILE USA, INC. 722   2017-08-11   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.