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: 279 [Rate centres in NPA 279] [Dial plan for NPA 279]

NXX: 284

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
279-284 A Sacramento: North DA CA   649C ONVOY, LLC - CA 726   2025-04-05   
279-284 0 Sacramento: North DA CA   649C ONVOY, LLC - CA 726   2025-04-05   
279-284 1 Sacramento: North DA CA   649C ONVOY, LLC - CA 726   2025-05-10   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.