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: 576

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-576 A Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2024-01-21   
831-576 0 Santa Cruz CA   996H AIRESPRING, INC. 722   2020-05-18   
831-576 1 Santa Cruz CA   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-576 2 Santa Cruz CA   649C ONVOY, LLC - CA 722   2007-09-07   
831-576 3 Santa Cruz CA   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-576 4 Santa Cruz CA   649C ONVOY, LLC - CA 722      
831-576 5 Santa Cruz CA   649C ONVOY, LLC - CA 722      
831-576 6 Santa Cruz CA   649C ONVOY, LLC - CA 722      
831-576 7 Santa Cruz CA   6529 T-MOBILE USA, INC. 722   2021-04-01   
831-576 8 Santa Cruz CA   649C ONVOY, LLC - CA 722      
831-576 9 Santa Cruz CA   649C ONVOY, LLC - CA 722      

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

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