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: CLMAMOXAXIX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
573-296 A Hallsville MO 093F ONVOY, LLC - MO 521      
573-615 A Columbia MO 093F ONVOY, LLC - MO 521      
573-709 A Clarksburg MO 093F ONVOY, LLC - MO 521      
573-810 A Columbia MO 093F ONVOY, LLC - MO 521      
573-863 A California MO 093F ONVOY, LLC - MO 521      
573-907 A St Thomas MO 093F ONVOY, LLC - MO 521      
573-940 A Ashland MO 093F ONVOY, LLC - MO 521      
573-949 A Hallsville MO 093F ONVOY, LLC - MO 521      
573-968 A Columbia MO 093F ONVOY, LLC - MO 521      
573-988 A Columbia MO 093F ONVOY, LLC - MO 521   2024-08-24   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.