Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 936

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-936 A Sumner IL SMNRILXERS0  1015 FRONTIER NORTH, INC. - IL 978      
618-936 0 Sumner IL   224C ONVOY, LLC 978   2020-03-13   
618-936 2 Sumner IL   1015 FRONTIER NORTH, INC. - IL 978      
618-936 3 Sumner IL   224C ONVOY, LLC 978   2021-04-24   
618-936 4 Sumner IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 978   2004-07-17   
618-936 5 Sumner IL   624H ONVOY SPECTRUM, LLC 978   2023-07-29   
618-936 6 Sumner IL   9915 DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL 978   2003-06-04   
618-936 7 Sumner IL   224C ONVOY, LLC 978   2021-02-26   
618-936 8 Sumner IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2015-07-12   
618-936 9 Sumner IL   1015 FRONTIER NORTH, INC. - IL 978      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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