Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Grand Detour, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
779-443 A   318J COMCAST IP PHONE, LLC 364   2026-03-21   
779-443 4   318J COMCAST IP PHONE, LLC 364   2026-03-21   
815-652 A GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 0 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 1 DKLBILRS0MD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 364   2015-01-16   
815-652 2 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 3 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 4 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 5 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 6 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 7 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 8 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      
815-652 9 GRDTILXARS0  1057 BRIGHTSPEED OF ILLINOIS, LLC 364      

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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