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: 350

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-350 A Delta MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-350 1 Delta MO   225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2013-05-09   
573-350 3 Delta MO   624H ONVOY SPECTRUM, LLC 520   2025-01-11   
573-350 4 Delta MO   093F ONVOY, LLC - MO 520   2016-09-27   
573-350 6 Delta MO   225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2013-05-09   
573-350 7 Delta MO   508J CENTURYLINK COMMUNICATIONS, LLC 520   2014-07-21   
573-350 8 Delta MO   073H TELNYX LLC 520   2018-12-01   
573-350 9 Delta MO   515J IP HORIZON LLC 520   2013-12-19   

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

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