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: SNJUCACL1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
510-464 0 Oakland: Main-Piedmont DA CA 222H LOCAL ACCESS SERVICES LLC - CA 722   2016-09-14   
707-917 9 Vallejo CA 222H LOCAL ACCESS SERVICES LLC - CA 722   2016-09-15   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.