Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 446

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-446 A Brimfield IL BMFDILXDRS0  1015 FRONTIER NORTH, INC. - IL 368      
309-446 1 Brimfield IL   624H ONVOY SPECTRUM, LLC 368   2021-11-13   
309-446 2 Brimfield IL   145J TERRA NOVA TELECOM INC. 368   2025-06-06   
309-446 3 Brimfield IL   1015 FRONTIER NORTH, INC. - IL 368      
309-446 4 Brimfield IL   455H CENTURY ENTERPRISES, INC. - IL 368   2017-10-15   
309-446 5 Brimfield IL   318J COMCAST IP PHONE, LLC 368   2026-01-03   
309-446 6 Brimfield IL   224C ONVOY, LLC 368   2018-08-02   
309-446 7 Brimfield IL   224C ONVOY, LLC 368   2019-09-06   
309-446 8 Brimfield IL   224C ONVOY, LLC 368   2019-09-06   
309-446 9 Brimfield IL   1015 FRONTIER NORTH, INC. - IL 368      

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

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