Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-583 A Tekonsha MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
517-583 0 Tekonsha MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2005-11-12   
517-583 1 Tekonsha MI   792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
517-583 2 Tekonsha MI   543C ONVOY, LLCV - MI 348   2007-03-09   
517-583 3 Tekonsha MI   991E BANDWIDTH.COM CLEC, LLC - MI 348   2018-08-23   
517-583 4 Tekonsha MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
517-583 5 Tekonsha MI   624H ONVOY SPECTRUM, LLC 348   2024-05-31   
517-583 7 Tekonsha MI   508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-19   

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

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