Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 835

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-835 A South San Francisco CA   515J IP HORIZON LLC 722      
650-835 0 South San Francisco CA   515J IP HORIZON LLC 722      
650-835 1 South San Francisco CA   506J TWILIO INTERNATIONAL, INC. 722      
650-835 2 South San Francisco CA   515J IP HORIZON LLC 722      
650-835 3 South San Francisco CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2010-11-04   
650-835 4 South San Francisco CA   515J IP HORIZON LLC 722      
650-835 5 South San Francisco CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2010-11-04   
650-835 7 South San Francisco CA   649C ONVOY, LLC - CA 722   2009-12-24   
650-835 8 South San Francisco CA   649C ONVOY, LLC - CA 722   2010-10-26   
650-835 9 South San Francisco CA   649C ONVOY, LLC - CA 722   2026-01-04   

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

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