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: 742

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-742 A Mound City IL OLMSILOMRS0  9329 ILLINOIS BELL TEL CO 362      
618-742 0 Mound City IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 362   2010-05-09   
618-742 1 Mound City IL   073H TELNYX LLC 362   2020-07-16   
618-742 2 Mound City IL   224C ONVOY, LLC 362   2019-09-07   
618-742 3 Mound City IL   224C ONVOY, LLC 362   2019-09-07   
618-742 5 Mound City IL   516C AT&T CORP. 362   2025-10-06   
618-742 6 Mound City IL   9329 ILLINOIS BELL TEL CO 362      
618-742 7 Mound City IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 362   2025-10-20   
618-742 8 Mound City IL   145J TERRA NOVA TELECOM INC. 362   2025-07-31   
618-742 9 Mound City IL   9915 DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL 362   2003-02-05   

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

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