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.

Mazon, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
779-228 A CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
779-228 0 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-06-05   
779-228 1 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-06-05   
779-228 2 CHCGIL24DS6  224C ONVOY, LLC 358   2014-09-07   
779-228 3 CHCGIL24DS6  224C ONVOY, LLC 358   2016-04-14   
779-228 4 CHCGIL24DS6  224C ONVOY, LLC 358   2016-04-14   
779-228 5 CHCGILWUJMD  073H TELNYX LLC 358   2018-07-24   
779-228 6 CHCGIL24DS6  224C ONVOY, LLC 358   2019-09-06   
779-228 7 CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-02-24   
779-228 8 OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2019-06-28   
779-228 9 CHCGIL24DS6  224C ONVOY, LLC 358   2018-12-27   
779-295 A CHCGIL24XMD  495J STRATUS NETWORKS 358      
779-295 0 CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-04-28   
779-295 1 CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-10-31   
779-295 2 CHCGIL24DS6  224C ONVOY, LLC 358   2020-11-01   
779-295 3 CHCGIL24DS6  224C ONVOY, LLC 358   2020-11-01   
815-448 A MAZNILMZRS0  9329 ILLINOIS BELL TEL CO 358      
815-448 0 CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2012-03-07   
815-448 1 CHCGILCLXOX  516C AT&T CORP. 358   2011-06-01   
815-448 2 MAZNILMZRS0  9329 ILLINOIS BELL TEL CO 358      
815-448 3 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2006-07-30   
815-448 5 MAZNILMZRS0  9329 ILLINOIS BELL TEL CO 358      
815-448 6 CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2006-08-06   
815-448 7 CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-11-13   
815-448 8 CHCGILWUSMD  145J TERRA NOVA TELECOM INC. 358   2024-08-09   
815-448 9 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-03-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.