Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Williamsfield, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
309-616 A GLBGILXD5MD  593K MCC TELEPHONY LLC 977      
309-616 9   593K MCC TELEPHONY LLC 977   2010-07-24   
309-639 A VCTAILXDRS0  1054 MID CENTURY TEL. COOP., INC. 977      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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