Local Calling Guide

Area code/prefix search

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Clark, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
573-641 A CLRKMOXARS0  9784 BRIGHTSPEED OF MISSOURI, LLC 521      
573-641 0   073H TELNYX LLC 521   2020-07-30   
573-641 1   792K CHARTER IP ENABLED SERVICES, LLC 521   2024-11-10   
573-641 2   093F ONVOY, LLC - MO 521   2019-11-29   
573-641 3   093F ONVOY, LLC - MO 521   2019-09-02   
573-641 4   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521   2013-08-26   
573-641 5   9784 BRIGHTSPEED OF MISSOURI, LLC 521      
573-641 8   093F ONVOY, LLC - MO 521   2019-11-29   
573-641 9   9784 BRIGHTSPEED OF MISSOURI, LLC 521      

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

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