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: 364 [Rate centres in NPA 364] [Dial plan for NPA 364]

NXX: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
364-666 A Arlington KY   896E ONVOY, LLC - KY 464   2026-02-20   
364-666 0 Arlington KY   896E ONVOY, LLC - KY 464   2026-02-20   
364-666 6 Arlington KY   896E ONVOY, LLC - KY 464   2026-02-20   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.