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: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-428 A Santa Cruz CA OKLECAZV1MD  5562 METROPCS, INC. 722      
831-428 0 Santa Cruz CA   073H TELNYX LLC 722   2022-12-22   
831-428 1 Santa Cruz CA   5562 METROPCS, INC. 722   2007-09-18   
831-428 2 Santa Cruz CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2005-07-11   
831-428 3 Santa Cruz CA   5562 METROPCS, INC. 722   2007-09-18   
831-428 4 Santa Cruz CA   5562 METROPCS, INC. 722   2012-07-27   
831-428 5 Santa Cruz CA   5562 METROPCS, INC. 722      
831-428 6 Santa Cruz CA   5562 METROPCS, INC. 722   2012-07-27   
831-428 7 Santa Cruz CA   508J CENTURYLINK COMMUNICATIONS, LLC 722   2014-04-09   
831-428 8 Santa Cruz CA   649C ONVOY, LLC - CA 722   2013-03-29   
831-428 9 Santa Cruz CA   5562 METROPCS, INC. 722      

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

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