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.

Warrenton MCA6, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-377 A WRTNMOXADS0  9787 BRIGHTSPEED OF MISSOURI, LLC 520      
636-377 0   993E BANDWIDTH.COM CLEC, LLC - MO 520   2009-01-17   
636-377 1   792K CHARTER IP ENABLED SERVICES, LLC 520   2011-02-14   
636-377 2   9787 BRIGHTSPEED OF MISSOURI, LLC 520   2007-03-01   
636-377 3   6529 T-MOBILE USA, INC. 520   2012-10-06   
636-377 4   792K CHARTER IP ENABLED SERVICES, LLC 520   2015-01-23   
636-377 5   829J PAETEC ITEL, LLC 520   2012-10-21   
636-377 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2016-08-30   
636-377 7   093F ONVOY, LLC - MO 520   2023-09-10   
636-377 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2017-04-13   
636-377 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2017-04-13   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.