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: CHCGILSTDS0

Remotes:

Switch Switch name Switch type
CHCGILMHRS0  CHICAGO MITCHELL  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
773-224 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-361 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-371 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-483 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-487 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-602 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-834 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-873 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      
773-892 A Chicago Zone 07-Stewart IL 9329 AMERITECH ILLINOIS 358      

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

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