Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 831 [Rate centres in NPA 831] [Dial plan for NPA 831]

NXX: 900

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-900 A Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
831-900 0 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-07-04   
831-900 1 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-08-07   
831-900 2 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-08-07   
831-900 3 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-08-07   
831-900 4 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-08-07   
831-900 5 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-08-07   
831-900 6 Santa Cruz CA   515J IP HORIZON LLC 722   2016-09-15   
831-900 7 Santa Cruz CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2016-09-23   
831-900 8 Santa Cruz CA   6529 T-MOBILE USA, INC. 722   2016-09-03   
831-900 9 Santa Cruz CA   649C ONVOY, LLC - CA 722   2016-07-04   

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

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