Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington MCA5, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-432 A WASHMOBERS0  9533 SOUTHWESTERN BELL 520      
636-432 0   9533 SOUTHWESTERN BELL 520   2006-03-03   
636-432 1   792K CHARTER IP ENABLED SERVICES, LLC 520   2006-07-20   
636-432 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2009-03-05   
636-432 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2009-12-22   
636-432 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2010-08-07   
636-432 5   792K CHARTER IP ENABLED SERVICES, LLC 520   2012-10-14   
636-432 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2012-12-28   
636-432 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2013-11-11   
636-432 9   6529 T-MOBILE USA, INC. 520   2006-09-05   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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