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: 554

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-554 A Lacon IL PEORILPJXMY  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 368      
309-554 0 Lacon IL   224C ONVOY, LLC 368   2019-07-15   
309-554 1 Lacon IL   224C ONVOY, LLC 368   2019-07-15   
309-554 2 Lacon IL   224C ONVOY, LLC 368   2021-07-05   
309-554 3 Lacon IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 368   2021-09-09   
309-554 4 Lacon IL   984E BANDWIDTH.COM CLEC, LLC - IL 368   2020-02-28   
309-554 5 Lacon IL   224C ONVOY, LLC 368   2018-10-16   
309-554 6 Lacon IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 368   2017-05-08   
309-554 7 Lacon IL   508J CENTURYLINK COMMUNICATIONS, LLC 368   2016-08-03   
309-554 8 Lacon IL   495J STRATUS NETWORKS 368   2020-08-08   
309-554 9 Lacon IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 368   2010-03-06   

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

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