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: CHCGILWUIMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
224-354 A Des Plaines IL 197D VONAGE AMERICA LLC 358      
312-414 A Chicago Zone 01-Calumet IL 197D VONAGE AMERICA LLC 358      
331-247 A Naperville IL 197D VONAGE AMERICA LLC 358      
331-267 A Lombard IL 197D VONAGE AMERICA LLC 358      
630-349 A Elmhurst IL 197D VONAGE AMERICA LLC 358      
872-255 A Chicago Zone 04-Humboldt IL 197D VONAGE AMERICA LLC 358      
872-273 A Chicago Zone 03-Kildare IL 197D VONAGE AMERICA LLC 358      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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