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: DKLBILXAXCX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
779-276 A De Kalb IL 495J STRATUS NETWORKS 364      
779-316 A Creston IL 495J STRATUS NETWORKS 364      
779-317 A Kirkland IL 495J STRATUS NETWORKS 364      
779-318 A Malta IL 495J STRATUS NETWORKS 364      
779-319 A Maple Park IL 495J STRATUS NETWORKS 364      
779-320 A Monroe Center IL 495J STRATUS NETWORKS 364      
779-321 A Shabbona IL 495J STRATUS NETWORKS 364      
779-322 A Thomas (Bureau) IL 495J STRATUS NETWORKS 364      
779-325 A Franklin Grove IL 495J STRATUS NETWORKS 364      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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