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: 610

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-610 A Boulder Creek CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
831-610 0 Boulder Creek CA   649C ONVOY, LLC - CA 722   2015-11-25   
831-610 1 Boulder Creek CA   515J IP HORIZON LLC 722      
831-610 2 Boulder Creek CA   515J IP HORIZON LLC 722      
831-610 3 Boulder Creek CA   649C ONVOY, LLC - CA 722   2016-02-24   
831-610 4 Boulder Creek CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-05-08   
831-610 5 Boulder Creek CA   649C ONVOY, LLC - CA 722   2012-12-30   
831-610 6 Boulder Creek CA   649C ONVOY, LLC - CA 722   2012-12-30   
831-610 7 Boulder Creek CA   649C ONVOY, LLC - CA 722   2012-12-30   
831-610 8 Boulder Creek CA   318J COMCAST IP PHONE, LLC 722   2015-04-08   
831-610 9 Boulder Creek CA   649C ONVOY, LLC - CA 722   2016-02-24   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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