Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
815-358 A CRNLILXADS0  1009 C-R TELEPHONE CO. 366      
815-920 A BLTNILXDXPX  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366      
815-920 0   145J TERRA NOVA TELECOM INC. 366   2025-05-27   
815-920 9   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366   2010-03-06   

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

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