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: SNJUCACL9MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
341-688 A Oakland: Berkeley DA CA 516J TON80 COMMUNICATIONS, LLC 722      
341-837 A El Sobrante-Pinole CA 516J TON80 COMMUNICATIONS, LLC 722      
650-782 A Los Altos CA 516J TON80 COMMUNICATIONS, LLC 722      
669-437 A Morgan Hill CA 516J TON80 COMMUNICATIONS, LLC 722      
669-455 A Sunnyvale CA 516J TON80 COMMUNICATIONS, LLC 722      
669-639 A Los Gatos CA 516J TON80 COMMUNICATIONS, LLC 722      
669-746 A Gilroy CA 516J TON80 COMMUNICATIONS, LLC 722      
669-832 A San Jose: West DA CA 516J TON80 COMMUNICATIONS, LLC 722      
669-837 A San Jose: South DA CA 516J TON80 COMMUNICATIONS, LLC 722      
831-366 A Boulder Creek CA 516J TON80 COMMUNICATIONS, LLC 722      
925-537 A Livermore CA 516J TON80 COMMUNICATIONS, LLC 722      
925-546 A Walnut Creek CA 516J TON80 COMMUNICATIONS, LLC 722      
925-578 A East Contra Costa CA 516J TON80 COMMUNICATIONS, LLC 722      
925-832 A East Contra Costa CA 516J TON80 COMMUNICATIONS, LLC 722      
925-834 A Antioch CA 516J TON80 COMMUNICATIONS, LLC 722      

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

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