Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 800

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-800 A St Charles MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-800 0 St Charles MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2015-12-14   
636-800 1 St Charles MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2019-01-11   
636-800 2 St Charles MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2019-11-28   
636-800 3 St Charles MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2019-11-28   
636-800 4 St Charles MO STLSMOPL5MD  197D VONAGE AMERICA LLC 520   2019-12-06   
636-800 6 St Charles MO STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2020-04-15   
636-800 8 St Charles MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2015-12-14   
636-800 9 St Charles MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2019-02-02   

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

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