Local Calling Guide

Area code/prefix search

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

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-900 8 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2015-12-14   
636-900 9   792K CHARTER IP ENABLED SERVICES, LLC 520   2015-12-15   

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Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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