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: SNFCCAMMDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-341 A San Francisco: Central DA CA 485E ASTOUND BROADBAND, LLC - CA 722      
415-349 A San Francisco: Juniper DA CA 485E ASTOUND BROADBAND, LLC - CA 722      
650-273 A South San Francisco CA 485E ASTOUND BROADBAND, LLC - CA 722      
650-282 A Mountain View CA 485E ASTOUND BROADBAND, LLC - CA 722      
650-458 A San Mateo CA 485E ASTOUND BROADBAND, LLC - CA 722      
650-679 A Redwood City CA 485E ASTOUND BROADBAND, LLC - CA 722      
650-731 A San Francisco: Juniper DA CA 485E ASTOUND BROADBAND, LLC - CA 722      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.