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: 522

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-522 A Kirkland IL KRLDILXARS0  1036 FRONTIER NORTH, INC. - IL 364      
815-522 0 Kirkland IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 364   2010-04-09   
815-522 1 Kirkland IL   224C ONVOY, LLC 364   2019-09-07   
815-522 2 Kirkland IL   1036 FRONTIER NORTH, INC. - IL 364      
815-522 3 Kirkland IL   1036 FRONTIER NORTH, INC. - IL 364      
815-522 4 Kirkland IL   073H TELNYX LLC 364   2020-07-13   
815-522 5 Kirkland IL   224C ONVOY, LLC 364   2018-10-01   
815-522 6 Kirkland IL   1036 FRONTIER NORTH, INC. - IL 364      
815-522 7 Kirkland IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 364   2014-08-08   
815-522 8 Kirkland IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 364   2020-03-09   
815-522 9 Kirkland IL   1036 FRONTIER NORTH, INC. - IL 364      

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

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