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: DWGVILDGDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
630-241 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-271 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-275 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-322 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-434 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-435 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-493 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-663 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-769 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      
630-795 A Downers Grove IL 9329 AMERITECH ILLINOIS 358      

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

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