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.

De Soto MCA5, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-337 A DESTMOGIRS0  9533 SOUTHWESTERN BELL 520      
636-337 0 DESTMOGIRS0  9533 SOUTHWESTERN BELL 520      
636-337 1 DESTMOGIRS0  9533 SOUTHWESTERN BELL 520      
636-337 2 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2016-03-28   
636-337 3 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2016-03-28   
636-337 4 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2016-09-27   
636-337 5   792K CHARTER IP ENABLED SERVICES, LLC 520   2006-06-15   
636-337 6   792K CHARTER IP ENABLED SERVICES, LLC 520   2012-05-28   
636-337 7 DESTMOGIRS0  9533 SOUTHWESTERN BELL 520      
636-337 8 DESTMOGIRS0  9533 SOUTHWESTERN BELL 520      
636-337 9 STLSMOGZ8MD  939H COMMIO, LLC 520   2023-09-07   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.