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.

Lyndon, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
815-778 A LYNDILXADS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 364      
815-897 A DIXNILXA0MD  846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 364      
815-897 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 364   2022-02-24   
815-897 7   508J CENTURYLINK COMMUNICATIONS, LLC 364   2014-08-08   
815-897 9   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 364   2010-04-15   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.