Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CRLCILXDRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
309-376 A Carlock IL 1015 FRONTIER NORTH, INC. - IL 366      
309-376 2 Carlock IL 1015 FRONTIER NORTH, INC. - IL 366      
309-376 3 Carlock IL 1015 FRONTIER NORTH, INC. - IL 366      
309-376 4 Carlock IL 1015 FRONTIER NORTH, INC. - IL 366      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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