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: DWGHILDHRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
815-584 A Dwight IL 9329 ILLINOIS BELL TEL CO 358      
815-584 1 Dwight IL 9329 ILLINOIS BELL TEL CO 358      
815-584 2 Dwight IL 9329 ILLINOIS BELL TEL CO 358      
815-584 3 Dwight IL 9329 ILLINOIS BELL TEL CO 358      
815-584 4 Dwight IL 9329 ILLINOIS BELL TEL CO 358      
815-584 9 Dwight IL 9329 ILLINOIS BELL TEL CO 358      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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