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: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-837 A South San Francisco CA SNBUCA02DS0  9740 PACIFIC BELL 722      
650-837 0 South San Francisco CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2013-07-14   
650-837 1 South San Francisco CA   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2014-10-09   
650-837 2 South San Francisco CA   9740 PACIFIC BELL 722      
650-837 4 South San Francisco CA   9740 PACIFIC BELL 722      
650-837 5 South San Francisco CA   9740 PACIFIC BELL 722      
650-837 7 South San Francisco CA   9740 PACIFIC BELL 722      
650-837 8 South San Francisco CA   9740 PACIFIC BELL 722      
650-837 9 South San Francisco CA   9740 PACIFIC BELL 722      

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

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