Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 660 [Rate centres in NPA 660] [Dial plan for NPA 660]

NXX: 717

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-717 A Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524      
660-717 0 Marshall MO   093F ONVOY, LLC - MO 524   2016-03-04   
660-717 1 Marshall MO   993E BANDWIDTH.COM CLEC, LLC - MO 524   2016-07-16   
660-717 2 Marshall MO   093F ONVOY, LLC - MO 524   2017-07-03   
660-717 3 Marshall MO   093F ONVOY, LLC - MO 524   2019-05-17   
660-717 4 Marshall MO   093F ONVOY, LLC - MO 524   2021-05-15   
660-717 5 Marshall MO   093F ONVOY, LLC - MO 524   2021-05-15   
660-717 6 Marshall MO   093F ONVOY, LLC - MO 524   2024-04-05   
660-717 7 Marshall MO   093F ONVOY, LLC - MO 524   2024-05-12   
660-717 8 Marshall MO   093F ONVOY, LLC - MO 524   2024-10-07   
660-717 9 Marshall MO   624H ONVOY SPECTRUM, LLC 524   2024-03-20   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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