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: CHCGILNEDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-601 A Skokie IL 9329 ILLINOIS BELL TEL CO 358      
708-457 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
708-667 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
708-867 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-467 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-594 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-631 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-763 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-774 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-775 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-792 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
773-990 A Chicago Zone 03-Kildare IL 9329 ILLINOIS BELL TEL CO 358      
847-588 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
847-600 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      
847-647 A Chicago Zone 03-Newcastle IL 9329 ILLINOIS BELL TEL CO 358      

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

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