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: 661

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
831-661 A Aptos CA APTSCA12DS0  9740 PACIFIC BELL 722      
831-661 0 Aptos CA   9740 PACIFIC BELL 722      
831-661 1 Aptos CA   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-661 2 Aptos CA   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-661 3 Aptos CA   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-661 4 Aptos CA   9740 PACIFIC BELL 722      
831-661 5 Aptos CA   318J COMCAST IP PHONE, LLC 722   2009-03-19   
831-661 6 Aptos CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2011-01-26   
831-661 7 Aptos CA   9740 PACIFIC BELL 722      
831-661 8 Aptos CA   649C ONVOY, LLC - CA 722   2013-05-28   
831-661 9 Aptos CA   649C ONVOY, LLC - CA 722   2015-04-30   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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