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: 228

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-228 A Farmington IL PEORILTCDS0  5800 ITV-3, LLC D/B/A I3 BROADBAND 368      
309-228 1 Farmington IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 368   2010-03-15   
309-228 2 Farmington IL   224C ONVOY, LLC 368   2017-03-24   
309-228 3 Farmington IL   508J CENTURYLINK COMMUNICATIONS, LLC 368   2016-08-10   
309-228 4 Farmington IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 368   2004-07-16   
309-228 5 Farmington IL   516C AT&T CORP. 368   2011-08-22   
309-228 6 Farmington IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-01   
309-228 7 Farmington IL   145J TERRA NOVA TELECOM INC. 368   2025-01-08   
309-228 9 Farmington IL   073H TELNYX LLC 368   2018-07-20   

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

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