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: DRFDILDFDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-632 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-236 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-267 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-282 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-315 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-317 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-374 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-405 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-444 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-527 A Deerfield IL 9329 AMERITECH ILLINOIS 358   2007-12-02   
847-579 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-831 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-914 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-940 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-945 A Deerfield IL 9329 AMERITECH ILLINOIS 358      
847-948 A Deerfield IL 9329 AMERITECH ILLINOIS 358      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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