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.

Chicago Zone 01-Canal, IL

<< 1 2 3 4 5

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-993 4 CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 5 CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 6 CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 7 CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 8 CHCGILCLDS0  9329 ILLINOIS BELL TEL CO 358      
312-993 9 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358      

<< 1 2 3 4 5

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.