Local Calling Guide

Area code/prefix search

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

NXX: 856

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-856 A Patterson MO PASNMOXXRS0  1885 WINDSTREAM MISSOURI, INC. 520      
573-856 0 Patterson MO   1885 WINDSTREAM MISSOURI, INC. 520      
573-856 1 Patterson MO   624H ONVOY SPECTRUM, LLC 520   2025-01-11   
573-856 3 Patterson MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2017-10-16   
573-856 4 Patterson MO   1885 WINDSTREAM MISSOURI, INC. 520      
573-856 5 Patterson MO   093F ONVOY, LLC - MO 520   2021-07-24   
573-856 9 Patterson MO   1885 WINDSTREAM MISSOURI, INC. 520   2020-02-17   

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

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