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: 707 [Rate centres in NPA 707] [Dial plan for NPA 707]

NXX: 858

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
707-858 A Santa Rosa CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
707-858 0 Santa Rosa CA   6529 T-MOBILE USA, INC. 722   2021-07-09   
707-858 1 Santa Rosa CA   624H ONVOY SPECTRUM, LLC 722   2021-05-22   
707-858 2 Santa Rosa CA   624H ONVOY SPECTRUM, LLC 722   2021-05-22   
707-858 3 Santa Rosa CA   624H ONVOY SPECTRUM, LLC 722   2021-05-22   
707-858 4 Santa Rosa CA   6529 T-MOBILE USA, INC. 722   2021-07-09   
707-858 5 Santa Rosa CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2021-05-30   
707-858 6 Santa Rosa CA   515J IP HORIZON LLC 722   2021-05-01   
707-858 7 Santa Rosa CA   939H COMMIO, LLC 722   2021-12-21   
707-858 8 Santa Rosa CA   6529 T-MOBILE USA, INC. 722   2021-04-26   
707-858 9 Santa Rosa CA   6529 T-MOBILE USA, INC. 722   2021-04-26   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.