Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Cambridge, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
309-707 A GENSILXD2MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-707 1 GENSILXD2MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634   2010-04-15   
309-707 7   145J TERRA NOVA TELECOM INC. 634   2025-06-01   
309-937 A CMBRILXDDS0  0983 CAMBRIDGE TEL. CO. 634      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.