Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
217-967 A WSFDILXCRS0  1000 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 976      
217-967 1   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 976   2010-08-14   
217-967 2   224C ONVOY, LLC 976   2021-08-12   
217-967 5   1000 FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL 976      
217-967 6   224C ONVOY, LLC 976   2020-11-13   
217-967 7   224C ONVOY, LLC 976   2021-04-09   
217-967 9   145J TERRA NOVA TELECOM INC. 976   2025-08-02   

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

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