Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 244

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-244 A Delavan IL DLVNILDERS0  9329 ILLINOIS BELL TEL CO 368      
309-244 0 Delavan IL   9329 ILLINOIS BELL TEL CO 368      
309-244 1 Delavan IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-01   
309-244 3 Delavan IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 368   2010-03-15   
309-244 4 Delavan IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 368   2004-07-16   
309-244 6 Delavan IL   508J CENTURYLINK COMMUNICATIONS, LLC 368   2016-08-02   
309-244 7 Delavan IL   9329 ILLINOIS BELL TEL CO 368      
309-244 8 Delavan IL   9329 ILLINOIS BELL TEL CO 368      
309-244 9 Delavan IL   145J TERRA NOVA TELECOM INC. 368   2023-11-13   

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

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