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: WNVLMOXAXXX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
573-490 A Lewistown MO 093F ONVOY, LLC - MO 520      
573-531 A Timber MO 093F ONVOY, LLC - MO 520      
573-570 A Perry MO 093F ONVOY, LLC - MO 520      
573-652 A La Grange MO 093F ONVOY, LLC - MO 520      
573-812 A Cuba MO 093F ONVOY, LLC - MO 520      
573-871 A Hermann MO 093F ONVOY, LLC - MO 520      
636-589 A Warrenton MO 093F ONVOY, LLC - MO 520      

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

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