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: SNJSCA02DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-277 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 0 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 1 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 2 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 3 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 4 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 5 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 6 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 7 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-279 8 San Jose: West DA CA 9740 PACIFIC BELL 722      
408-282 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-283 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-286 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-287 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-288 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-885 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-918 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-938 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-947 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-971 A San Jose: West DA CA 9740 PACIFIC BELL 722      
408-998 A San Jose: West DA CA 9740 PACIFIC BELL 722      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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