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: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 709

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-709 A Clarksburg MO CLMAMOXAXIX  093F ONVOY, LLC - MO 521      
573-709 1 Clarksburg MO CLMAMOXAXIX  093F ONVOY, LLC - MO 521   2023-02-13   

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.