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: 408 [Rate centres in NPA 408] [Dial plan for NPA 408]

NXX: 683

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
408-683 A San Martin CA SNMACA11RS0  9740 PACIFIC BELL 722      
408-683 0 San Martin CA   9740 PACIFIC BELL 722      
408-683 1 San Martin CA   9740 PACIFIC BELL 722      
408-683 2 San Martin CA   9740 PACIFIC BELL 722      
408-683 3 San Martin CA   9740 PACIFIC BELL 722      
408-683 4 San Martin CA   9740 PACIFIC BELL 722      
408-683 5 San Martin CA   9740 PACIFIC BELL 722      
408-683 6 San Martin CA   9740 PACIFIC BELL 722      
408-683 7 San Martin CA   9740 PACIFIC BELL 722      
408-683 8 San Martin CA   9740 PACIFIC BELL 722      
408-683 9 San Martin CA   649C ONVOY, LLC - CA 722   2020-12-05   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.