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: CHCGILWBDS2

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-747 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-765 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-765 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-765 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-765 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-765 6 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-765 8 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-788 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-788 3 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-788 5 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-834 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-834 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-880 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-880 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-880 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-880 3 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-880 5 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-880 6 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-957 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-957 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-957 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-957 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-957 3 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-957 9 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-974 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-987 A Chicago Zone 01-Wabash 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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