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: 669 [Rate centres in NPA 669] [Dial plan for NPA 669]

NXX: 788

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
669-788 A Sunnyvale CA SNJUCACL7MD  965H FRACTEL, LLC 722      
669-788 0 Sunnyvale CA   939H COMMIO, LLC 722   2021-10-14   
669-788 1 Sunnyvale CA   939H COMMIO, LLC 722   2021-10-14   
669-788 2 Sunnyvale CA   939H COMMIO, LLC 722   2021-10-14   
669-788 3 Sunnyvale CA   939H COMMIO, LLC 722   2021-10-14   
669-788 4 Sunnyvale CA   939H COMMIO, LLC 722   2021-10-14   
669-788 5 Sunnyvale CA   624H ONVOY SPECTRUM, LLC 722   2021-11-15   
669-788 6 Sunnyvale CA   624H ONVOY SPECTRUM, LLC 722   2021-11-15   
669-788 7 Sunnyvale CA   553J WHITESKY COMMUNICATIONS, LLC 722   2021-09-16   
669-788 8 Sunnyvale CA   965H FRACTEL, LLC 722   2021-06-12   
669-788 9 Sunnyvale CA   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2021-09-09   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.