Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Campus, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
815-567 A CMPSILXARS1  1015 FRONTIER NORTH, INC. - IL 366      
815-567 1   624H ONVOY SPECTRUM, LLC 366   2023-06-02   
815-567 2   073H TELNYX LLC 366   2020-06-14   
815-567 3   1015 FRONTIER NORTH, INC. - IL 366      
815-567 4   495J STRATUS NETWORKS 366   2020-10-14   
815-567 5   224C ONVOY, LLC 366   2019-01-17   
815-567 6   224C ONVOY, LLC 366   2021-04-03   
815-567 7   508J CENTURYLINK COMMUNICATIONS, LLC 366   2014-08-12   
815-567 8   224C ONVOY, LLC 366   2019-07-15   
815-567 9   224C ONVOY, LLC 366   2019-07-15   

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

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