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.

Switch: SNJSCA12DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-252 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-253 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-255 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-257 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-285 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-341 A Campbell CA 9740 PACIFIC BELL 722      
408-342 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-343 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-364 A Campbell CA 9740 PACIFIC BELL 722      
408-366 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-374 A Campbell CA 9740 PACIFIC BELL 722      
408-378 A Campbell CA 9740 PACIFIC BELL 722      
408-379 A Campbell CA 9740 PACIFIC BELL 722      
408-387 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-777 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-796 A Campbell CA 9740 PACIFIC BELL 722      
408-861 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-863 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-867 A Saratoga CA 9740 PACIFIC BELL 722      
408-868 A Saratoga CA 9740 PACIFIC BELL 722      
408-874 A Campbell CA 9740 PACIFIC BELL 722      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.