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: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-500 A Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-500 0 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2019-01-10   
636-500 1 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2016-09-28   
636-500 2 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2016-09-28   
636-500 4 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-500 7 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2024-04-05   
636-500 9 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2024-04-05   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.