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: 723

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-723 A Colfax IL CLFXILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-723 1 Colfax IL BLTNILXDXPX  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 366   2010-03-15   
309-723 2 Colfax IL CLFXILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-723 3 Colfax IL CLFXILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-723 4 Colfax IL CLFXILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-723 5 Colfax IL CLFXILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-723 6 Colfax IL CLFXILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-723 7 Colfax IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-01-17   
309-723 8 Colfax IL BLTNILATVMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 366   2004-07-16   
309-723 9 Colfax IL BLTNILXDXZX  508J CENTURYLINK COMMUNICATIONS, LLC 366   2014-08-12   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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