Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
309-522 A CMBRILXDDS0  0983 CAMBRIDGE TEL. CO. 634      
309-845 A GENSILXD2MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-845 1 GENSILXD2MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634   2010-04-15   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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