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: OVLDMOBK0MD

<< 1 2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
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   

<< 1 2

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.