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: 623

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
815-623 A Roscoe IL ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 0 Roscoe IL   224C ONVOY, LLC 360   2020-05-21   
815-623 1 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 2 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 3 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 4 Roscoe IL   318J COMCAST IP PHONE, LLC 360   2006-08-09   
815-623 5 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 6 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 7 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 8 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      
815-623 9 Roscoe IL   1015 FRONTIER NORTH, INC. - IL 360      

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

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