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.

St Clair MCA5, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-322 A STCLMOMARS0  9533 SOUTHWESTERN BELL 520      
636-322 0 STCLMOMARS0  9533 SOUTHWESTERN BELL 520   2006-03-04   
636-322 1   792K CHARTER IP ENABLED SERVICES, LLC 520   2006-07-20   
636-322 2 STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2008-04-28   
636-322 3 WASHMOBEPS0  506E AURORA COMMUNICATIONS, INC. - MO 520   2008-10-11   
636-322 4 STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2011-09-17   
636-322 5   515J IP HORIZON LLC 520   2013-12-19   
636-322 6 STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2013-05-05   
636-322 7 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2024-04-05   
636-322 8 STLVMOOH6MD  5562 METROPCS, INC. 520   2007-07-20   
636-322 9 STLVMOOH6MD  5562 METROPCS, INC. 520   2006-09-05   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.