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.

NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-307 A Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 0 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 1 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722   2021-09-22   
650-307 2 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 3 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 4 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 5 Millbrae CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-04-01   
650-307 6 Millbrae CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-04-01   
650-307 7 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 8 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-307 9 Millbrae CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.