Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: MLBRCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-259 A Millbrae CA 9740 PACIFIC BELL 722      
650-552 A Millbrae CA 9740 PACIFIC BELL 722      
650-652 A Millbrae CA 9740 PACIFIC BELL 722      
650-692 A Millbrae CA 9740 PACIFIC BELL 722      
650-697 A Millbrae CA 9740 PACIFIC BELL 722      
650-777 A Millbrae CA 9740 PACIFIC BELL 722      

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

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