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: 339

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-339 A O'Fallon MO WNVLMOXAVMD  6529 T-MOBILE USA, INC. 520      
636-339 0 O'Fallon MO   145J TERRA NOVA TELECOM INC. 520   2025-05-30   
636-339 1 O'Fallon MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2024-10-25   
636-339 2 O'Fallon MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2022-08-24   
636-339 3 O'Fallon MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-01-03   
636-339 4 O'Fallon MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-01-03   
636-339 5 O'Fallon MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-01-03   
636-339 6 O'Fallon MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-01-03   
636-339 9 O'Fallon MO WNVLMOXAVMD  6529 T-MOBILE USA, INC. 520   2020-10-24   

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

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