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: CHCGILDT8MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
219-802 A Hammond IN 508J CENTURYLINK COMMUNICATIONS, LLC 358      
219-804 A East Chicago IN 508J CENTURYLINK COMMUNICATIONS, LLC 358      
224-405 A Northbrook IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
224-732 A Wauconda IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
224-801 A Palatine IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
224-802 A Dundee IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
224-813 A Deerfield IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
312-631 A Chicago Zone 01-Calumet IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
312-998 A Chicago Zone 01-Calumet IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
708-627 A Governors Park IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
708-787 A Beecher IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
815-205 A Coal City IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      
872-208 A Chicago Zone 02-Edgewater IL 508J CENTURYLINK COMMUNICATIONS, LLC 358      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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