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: 274

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-274 A Chillicothe IL CHLCILXDDS0  1015 FRONTIER NORTH, INC. - IL 368      
309-274 0 Chillicothe IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2017-04-02   
309-274 1 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 2 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 3 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 4 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 5 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 6 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 7 Chillicothe IL   224C ONVOY, LLC 368   2018-08-02   
309-274 8 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      
309-274 9 Chillicothe IL   1015 FRONTIER NORTH, INC. - IL 368      

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

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