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: 933

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-933 A Green River IL GENSILXD2MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-933 1 Green River IL GENSILXD2MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634   2010-04-15   
309-933 2 Green River IL DVNPIA80XUX  490J DISH WIRELESS, LLC 634   2022-12-17   
309-933 3 Green River IL   145J TERRA NOVA TELECOM INC. 634   2025-05-31   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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