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: DSPLILXLDS0

Remotes:

Switch Switch name Switch type
SCPKILSPRS3    RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-361 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      
773-694 A Chicago Zone 11-O'Hare IL 9329 ILLINOIS BELL TEL CO 358      
773-741 A Chicago Zone 11-O'Hare IL 9329 ILLINOIS BELL TEL CO 358      
847-294 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      
847-390 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      
847-635 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      
847-699 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      
847-768 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      
847-795 A Des Plaines IL 9329 ILLINOIS BELL TEL CO 358      

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

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