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: CHCGIL24DS7

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-207 A Libertyville IL 5917 FIRST COMMUNICATIONS, LLC 358      
224-383 A Northbrook IL 5917 FIRST COMMUNICATIONS, LLC 358      
312-506 A Chicago Zone 01-Franklin IL 5917 FIRST COMMUNICATIONS, LLC 358      
630-528 A Hinsdale IL 5917 FIRST COMMUNICATIONS, LLC 358      
630-957 A West Chicago IL 5917 FIRST COMMUNICATIONS, LLC 358      
630-967 A Downers Grove IL 5917 FIRST COMMUNICATIONS, LLC 358      
708-390 A Mokena IL 5917 FIRST COMMUNICATIONS, LLC 358      
708-468 A Tinley Park IL 5917 FIRST COMMUNICATIONS, LLC 358      
773-432 A Chicago Zone 08-Portsmouth IL 5917 FIRST COMMUNICATIONS, LLC 358      
773-537 A Chicago Zone 04-Humboldt IL 5917 FIRST COMMUNICATIONS, LLC 358      
773-565 A Chicago Zone 06-Kedzie IL 5917 FIRST COMMUNICATIONS, LLC 358      
773-597 A Chicago Zone 07-Stewart IL 5917 FIRST COMMUNICATIONS, LLC 358   2005-03-14   
847-666 A Arlington Heights IL 5917 FIRST COMMUNICATIONS, LLC 358      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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