Local Calling Guide

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NPA: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 943

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-943 A Mount Sterling MO MTSTMOXADS0  9787 BRIGHTSPEED OF MISSOURI, LLC 521      
573-943 0 Mount Sterling MO   093F ONVOY, LLC - MO 521   2019-11-29   
573-943 1 Mount Sterling MO   073H TELNYX LLC 521   2020-08-02   
573-943 2 Mount Sterling MO   9787 BRIGHTSPEED OF MISSOURI, LLC 521      
573-943 3 Mount Sterling MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521   2013-08-26   
573-943 4 Mount Sterling MO   093F ONVOY, LLC - MO 521   2018-07-16   
573-943 5 Mount Sterling MO   093F ONVOY, LLC - MO 521   2021-03-06   
573-943 6 Mount Sterling MO   9787 BRIGHTSPEED OF MISSOURI, LLC 521      
573-943 8 Mount Sterling MO   624H ONVOY SPECTRUM, LLC 521   2024-03-05   

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

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