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: 606

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-606 A Wyoming IL PEORILSCX0X  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 368      
309-606 0 Wyoming IL   145J TERRA NOVA TELECOM INC. 368   2025-05-27   
309-606 1 Wyoming IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-05   
309-606 4 Wyoming IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 368   2004-07-02   
309-606 5 Wyoming IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 368   2012-07-15   
309-606 6 Wyoming IL   224C ONVOY, LLC 368   2020-06-15   
309-606 7 Wyoming IL   508J CENTURYLINK COMMUNICATIONS, LLC 368   2016-08-06   
309-606 9 Wyoming IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 368   2010-04-15   

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

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