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: CHCGILCLDS3

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-526 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-526 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 0 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 1 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 2 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-537 9 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 1 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 2 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 6 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-544 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-559 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-568 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-568 0 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-568 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-575 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-589 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-589 1 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-589 9 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-612 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-612 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-612 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-612 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-612 6 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358   2000-10-24   
312-612 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358   2000-10-24   
312-612 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358   2000-10-24   
312-614 A Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358      
312-614 6 Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358   2012-11-18   
312-614 7 Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358   2012-11-18   
312-614 8 Chicago Zone 01-Calumet IL 9329 ILLINOIS BELL TEL CO 358   2012-11-18   
312-648 A Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 0 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 1 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 2 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 3 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 4 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 5 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 7 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 8 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-648 9 Chicago Zone 01-Canal IL 9329 ILLINOIS BELL TEL CO 358      
312-651 A 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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