Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 217 [Rate centres in NPA 217] [Dial plan for NPA 217]

NXX: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
217-583 A Royal IL ROYLILXCRS0  1000 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 370      
217-583 1 Royal IL   224C ONVOY, LLC 370   2019-07-05   
217-583 2 Royal IL   224C ONVOY, LLC 370   2019-07-05   
217-583 3 Royal IL   1000 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 370      
217-583 4 Royal IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 370   2005-03-24   
217-583 5 Royal IL   073H TELNYX LLC 370   2020-07-19   
217-583 6 Royal IL   508J CENTURYLINK COMMUNICATIONS, LLC 370   2016-06-16   
217-583 7 Royal IL   224C ONVOY, LLC 370   2021-02-12   
217-583 8 Royal IL   224C ONVOY, LLC 370   2018-10-07   
217-583 9 Royal IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 370   2015-01-10   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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