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: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-621 A Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 0 Palo Alto CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2010-12-27   
650-621 1 Palo Alto CA SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722      
650-621 2 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 3 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 4 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 5 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 6 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 7 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 8 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-621 9 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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