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: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 223

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-223 A Imperial MCA3 MO STLSMO09DS2  7421 AT&T - LOCAL 520      
636-223 0 Imperial MCA3 MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2005-09-02   
636-223 1 Imperial MCA3 MO STLSMO09DS2  7421 AT&T - LOCAL 520      
636-223 2 Imperial MCA3 MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2008-06-17   
636-223 3 Imperial MCA3 MO STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2010-05-10   
636-223 4 Imperial MCA3 MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2011-09-17   
636-223 5 Imperial MCA3 MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2014-05-02   
636-223 6 Imperial MCA3 MO   515J IP HORIZON LLC 520   2013-12-19   
636-223 7 Imperial MCA3 MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2014-06-25   
636-223 8 Imperial MCA3 MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2015-02-28   
636-223 9 Imperial MCA3 MO STLSMOGZ6MD  073H TELNYX LLC 520   2017-06-16   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.