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: CICRILCIDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
708-222 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-442 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-443 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-447 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-484 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-652 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-656 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-749 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-780 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-788 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-795 A Cicero IL 9329 AMERITECH ILLINOIS 358      
708-863 A Cicero IL 9329 AMERITECH ILLINOIS 358      
773-242 A Chicago Zone 05-Austin IL 9329 AMERITECH ILLINOIS 358      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

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