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: CHCGILCLDS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-887 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-887 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-887 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-887 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-887 6 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-887 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-887 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-912 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 0 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 1 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 2 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 6 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-928 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 0 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 1 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 2 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 6 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-993 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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