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: NCHCILNCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-302 A Waukegan IL 9329 ILLINOIS BELL TEL CO 358      
224-399 A Waukegan IL 9329 ILLINOIS BELL TEL CO 358      
224-572 A Waukegan IL 9329 ILLINOIS BELL TEL CO 358      
224-665 A Waukegan IL 9329 ILLINOIS BELL TEL CO 358      
224-667 A Waukegan IL 9329 ILLINOIS BELL TEL CO 358      
224-668 A Waukegan IL 9329 ILLINOIS BELL TEL CO 358      
224-772 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-473 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-578 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-689 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-775 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-785 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-887 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-935 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-936 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-937 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      
847-938 A North Chicago IL 9329 ILLINOIS BELL TEL CO 358      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.