Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 251

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-251 A Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 0 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 1 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 2 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 3 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 4 Palo Alto CA SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
650-251 5 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 6 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 7 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 8 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      
650-251 9 Palo Alto CA PLALCA12DS0  9740 PACIFIC BELL 722      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.