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: 340

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-340 A Santa Cruz CA HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2026-03-01   
831-340 2 Santa Cruz CA SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722   2026-05-01   
831-340 3 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2026-06-25   
831-340 4 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2026-06-25   
831-340 5 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2026-06-25   
831-340 6 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2026-06-25   
831-340 7 Santa Cruz CA SNFCCAMKX9X  073H TELNYX LLC 722   2026-05-07   
831-340 8 Santa Cruz CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2026-03-02   
831-340 9 Santa Cruz CA   649C ONVOY, LLC - CA 722   2026-08-17   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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