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: 975 [Rate centres in NPA 975] [Dial plan for NPA 975]

NXX: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
975-500 A Lonejack MO   093F ONVOY, LLC - MO 524   2026-12-06   
975-500 0 Lonejack MO   093F ONVOY, LLC - MO 524   2026-12-06   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.