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: CHCGILMEDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
773-237 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-385 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-479 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-622 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-637 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-745 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 0 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 1 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 2 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 3 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 4 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 5 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 6 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 7 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-804 9 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 1 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 3 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 5 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 7 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 8 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-836 9 Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      
773-889 A Chicago Zone 05-Merrimac IL 9329 ILLINOIS BELL TEL CO 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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