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: 612

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-612 A Aptos CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-612 0 Aptos CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-612 1 Aptos CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-01-25   
831-612 2 Aptos CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-14   
831-612 3 Aptos CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-30   
831-612 4 Aptos CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-30   
831-612 5 Aptos CA SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722   2014-05-20   
831-612 6 Aptos CA OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2013-11-23   
831-612 7 Aptos CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-22   
831-612 9 Aptos CA   145J TERRA NOVA TELECOM INC. 722   2023-04-26   

Last updated: Sat, 02 May 2026 12:20:53 UTC

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