Local Calling Guide

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Mount Olive, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
217-999 A MTOLILXCDS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 0   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 1   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 2   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 3   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 976   2022-05-11   
217-999 4   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 5   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 6   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 7   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      
217-999 8   145J TERRA NOVA TELECOM INC. 976   2025-08-02   
217-999 9   1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 976      

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

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