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: 243

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-243 A Dunlap IL DNLPILXDDS0  1015 FRONTIER NORTH, INC. - IL 368      
309-243 0 Dunlap IL   224C ONVOY, LLC 368   2020-05-22   
309-243 1 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368      
309-243 2 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368      
309-243 3 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368   2004-05-30   
309-243 4 Dunlap IL   224C ONVOY, LLC 368   2018-08-02   
309-243 5 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368      
309-243 6 Dunlap IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 368   2017-05-05   
309-243 7 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368      
309-243 8 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368      
309-243 9 Dunlap IL   1015 FRONTIER NORTH, INC. - IL 368      

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

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