Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 622

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-622 A Clarksburg MO CLMAMOWB0MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-622 4 Clarksburg MO CLMAMOWB0MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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