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: 303

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-303 A Union MO STLSMOWQ8MD  073H TELNYX LLC 520      
636-303 0 Union MO   073H TELNYX LLC 520   2017-05-07   
636-303 1 Union MO   093F ONVOY, LLC - MO 520   2017-07-03   
636-303 2 Union MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2019-12-24   
636-303 3 Union MO   5562 METROPCS, INC. 520   2018-03-15   
636-303 4 Union MO   145J TERRA NOVA TELECOM INC. 520   2024-05-10   
636-303 5 Union MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2020-07-04   
636-303 6 Union MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2018-07-10   
636-303 7 Union MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2018-07-10   
636-303 8 Union MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2017-06-30   
636-303 9 Union MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2017-06-30   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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