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-Superior, IL

<< 1 2 3 4

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-981 6 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358   2000-06-30   
312-981 7 CHCGILWUX1X  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2007-05-18   
312-981 8 CHCGILWUX1X  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2001-01-18   
312-981 9 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-08-07   
312-988 A CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 0 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2012-12-31   
312-988 1 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 2 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 3 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 4 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 5 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 6 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 7 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 8 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-988 9 CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      

<< 1 2 3 4

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.