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
312-212 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-212 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-212 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-212 6 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-235 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-235 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-235 7 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-235 8 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-291 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-291 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-292 2 Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358   2011-11-28   
312-292 3 Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358   2011-11-28   
312-292 4 Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358   2011-11-28   
312-293 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-360 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-386 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-386 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-386 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-386 3 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-386 4 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-386 9 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-447 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-447 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-461 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-566 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-566 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-566 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-566 5 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-566 9 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 3 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 4 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 5 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 6 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 8 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-583 9 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-588 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-588 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-588 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-588 2 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-588 4 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-588 5 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-662 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-662 1 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-675 A Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-675 0 Chicago Zone 01-Wabash IL 9329 ILLINOIS BELL TEL CO 358      
312-745 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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