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 02-Irving, IL

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
773-250 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 0 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 1 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 2 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 3 CHCGIL24DS6  224C ONVOY, LLC 358   2015-12-31   
773-250 4 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2005-11-19   
773-250 5 CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2006-01-20   
773-250 6 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-250 7 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-02-24   
773-250 8 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 9 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-267 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 0 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 1 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 2 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 3 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 4 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 5 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-279 6 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 7 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 8 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-279 9 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-442 A EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 0 EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 1 EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 2 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-442 3 EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 4 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358   2000-06-13   
773-442 5 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358   2000-06-13   
773-442 6 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358   2000-06-13   
773-442 7 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2025-05-07   
773-442 8 CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358   2001-04-24   
773-442 9 EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-463 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-478 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-509 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-539 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-583 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-588 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-604 A CHCGILIRDS0  9329 ILLINOIS BELL TEL CO 358      
773-681 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-681 0 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-09-27   
773-681 1 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2006-12-13   
773-681 2 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2007-06-26   
773-681 3 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-08-05   
773-681 4 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2007-06-26   
773-681 5 BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-681 6 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-08-14   
773-681 7 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-09-29   

1 2 >>

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.