Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 815 [Rate centres in NPA 815] [Dial plan for NPA 815]

NXX: 783

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-783 A Gilman IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
815-783 0 Gilman IL   073H TELNYX LLC 358   2018-07-24   
815-783 2 Gilman IL   224C ONVOY, LLC 358   2019-09-06   
815-783 3 Gilman IL   8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
815-783 5 Gilman IL   224C ONVOY, LLC 358   2016-04-14   
815-783 6 Gilman IL   224C ONVOY, LLC 358   2016-04-14   
815-783 7 Gilman IL   508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-02-24   

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

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