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: 874

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-874 A McLean IL MCLNILXDRS2  1015 FRONTIER NORTH, INC. - IL 366      
309-874 2 McLean IL MCLNILXDRS2  1015 FRONTIER NORTH, INC. - IL 366      
309-874 3 McLean IL MCLNILXDRS2  1015 FRONTIER NORTH, INC. - IL 366      
309-874 4 McLean IL BLTNILATVMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 366   2004-07-17   
309-874 9 McLean IL   145J TERRA NOVA TELECOM INC. 366   2022-11-02   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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