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: CHCGILTCDS4

Remotes:

Switch Switch name Switch type
CHCGILTCRS1    RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-330 A Northbrook IL 7056 XO ILLINOIS, INC. 358      
224-400 A Arlington Heights IL 7056 XO ILLINOIS, INC. 358      
312-284 A Chicago Zone 01-Franklin IL 7056 XO ILLINOIS, INC. 358      
312-999 A Chicago Zone 01-Calumet IL 7056 XO ILLINOIS, INC. 358      
331-462 A Lombard IL 7056 XO ILLINOIS, INC. 358      
630-405 A Aurora IL 7056 XO ILLINOIS, INC. 358      
708-433 A Beecher IL 7056 XO ILLINOIS, INC. 358      
815-321 A Woodstock IL 7056 XO ILLINOIS, INC. 358      
815-461 A Lockport IL 7056 XO ILLINOIS, INC. 358      
872-888 A Chicago Zone 02-Edgewater IL 7056 XO ILLINOIS, INC. 358      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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