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: CLMAMOXAXVX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
573-397 4 Columbia MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2012-03-03   
573-415 5 Jefferson City MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2025-03-16   
573-488 0 Ashland MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2016-09-25   
573-491 5 New Bloomfield MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2025-03-01   
573-554 9 Columbia MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2015-06-13   
573-641 1 Clark MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2024-11-10   
573-687 1 Sturgeon MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2024-11-24   
573-696 8 Hallsville MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2018-12-09   
573-698 1 Rocheport MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2013-10-13   
573-818 6 Columbia MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2013-04-21   
573-969 A Centralia MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2025-03-20   
573-969 0 Centralia MO 792K CHARTER IP ENABLED SERVICES, LLC 521   2011-10-14   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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