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.
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Switch: OVLDMOBK0MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
636-856 8 Wentzville MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2014-05-12   
636-856 9 Wentzville MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2015-12-07   
636-887 A Wentzville MO 792K CHARTER IP ENABLED SERVICES, LLC 520      
636-887 0 Wentzville MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2005-01-29   
636-887 2 Wentzville MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2005-12-01   
636-896 4 St Charles MCA3 MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2014-03-10   
636-932 1 Holstein MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2024-12-08   
636-987 1 Defiance MO 792K CHARTER IP ENABLED SERVICES, LLC 520   2023-03-05   

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

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