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: CHCGILEDDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
773-271 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-275 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-293 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-334 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-506 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-561 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-728 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-769 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-784 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-878 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-907 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      
773-989 A Chicago Zone 02-Edgewater IL 9329 AMERITECH ILLINOIS 358      

Last updated: Wed, 05 Feb 2020 02:15:44 UTC

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