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.

Switch: GENSILXD2MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
309-552 A Atkinson IL 846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-707 A Cambridge IL 846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-710 A Annawan IL 846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-845 A Osco IL 846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      
309-933 A Green River IL 846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 634      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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