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: SNJUCACL00Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
408-312 A San Martin CA 490J DISH WIRELESS, LLC 722      
650-751 A Woodside CA 490J DISH WIRELESS, LLC 722      
707-960 A Rio Vista CA 490J DISH WIRELESS, LLC 722      
707-970 A Windsor CA 490J DISH WIRELESS, LLC 722      
925-505 A Livermore CA 490J DISH WIRELESS, LLC 722      

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

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