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.

Crystal Lake, IL

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
779-220 A CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
779-220 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-07-24   
779-220 1   5562 METROPCS, INC. 358   2011-08-11   
779-220 2   984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-10-22   
779-220 3   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2012-04-13   
779-220 4   318J COMCAST IP PHONE, LLC 358   2012-09-16   
779-220 5   829J PAETEC ITEL, LLC 358   2011-08-18   
779-220 6   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-09-16   
779-220 7   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-09-16   
779-220 8   224C ONVOY, LLC 358   2012-09-30   
779-220 9   318J COMCAST IP PHONE, LLC 358   2013-01-13   
779-356 A CHCGILWURMD  965H FRACTEL, LLC 358      
779-356 0   495J STRATUS NETWORKS 358   2020-10-02   
779-356 1   515J IP HORIZON LLC 358   2021-06-14   
779-356 2   318J COMCAST IP PHONE, LLC 358   2022-05-10   
779-356 4   318J COMCAST IP PHONE, LLC 358   2022-05-10   
779-356 5   6529 T-MOBILE USA, INC. 358   2023-11-24   
779-356 6   6529 T-MOBILE USA, INC. 358   2023-11-24   
779-356 7   965H FRACTEL, LLC 358   2020-09-11   
779-356 8   224C ONVOY, LLC 358   2023-07-23   
779-356 9   965H FRACTEL, LLC 358   2020-09-11   
779-388 A CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-05-25   
779-388 0   624H ONVOY SPECTRUM, LLC 358   2024-05-25   
779-388 1   6529 T-MOBILE USA, INC. 358   2025-02-06   
779-388 3   145J TERRA NOVA TELECOM INC. 358   2025-10-06   
779-800 A CHCGIL24DS6  224C ONVOY, LLC 358      
779-800 0   224C ONVOY, LLC 358   2013-06-02   
779-800 1   224C ONVOY, LLC 358   2023-04-07   
779-800 2   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-05-19   
779-800 3   224C ONVOY, LLC 358   2014-04-12   
779-800 4   224C ONVOY, LLC 358   2013-06-02   
779-800 5   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-01-04   
779-800 6   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-21   
779-800 7   508J CENTURYLINK COMMUNICATIONS, LLC 358   2013-06-28   
779-800 8   224C ONVOY, LLC 358   2013-06-02   
779-800 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-05-21   
779-994 A CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
779-994 0   515J IP HORIZON LLC 358   2013-08-26   
779-994 1   224C ONVOY, LLC 358   2016-01-21   
779-994 2   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-06-01   
779-994 3   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-06-01   
779-994 4   318J COMCAST IP PHONE, LLC 358   2014-02-22   
779-994 5   829J PAETEC ITEL, LLC 358   2014-08-20   
779-994 6   073H TELNYX LLC 358   2017-04-24   
779-994 7   318J COMCAST IP PHONE, LLC 358   2015-07-25   
779-994 8   224C ONVOY, LLC 358   2016-03-11   
779-994 9   224C ONVOY, LLC 358   2016-03-11   
815-204 A LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
815-219 A ELGNILOTGT5  5562 METROPCS, INC. 358      
815-219 0   6529 T-MOBILE USA, INC. 358   2006-07-28   
815-219 1   5562 METROPCS, INC. 358   2006-07-28   
815-219 2   6529 T-MOBILE USA, INC. 358   2006-07-28   
815-219 3   5562 METROPCS, INC. 358   2006-07-28   
815-219 4   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-05-09   
815-219 5   5562 METROPCS, INC. 358   2006-07-28   
815-219 6   5562 METROPCS, INC. 358   2007-12-27   
815-219 7   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-07-02   
815-219 8   5562 METROPCS, INC. 358   2007-07-16   
815-219 9   5562 METROPCS, INC. 358   2007-07-16   
815-261 A EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
815-261 0   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-09-05   
815-261 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-09-05   
815-261 2   5562 METROPCS, INC. 358   2010-12-15   
815-261 3   460K FIRST COMMUNICATIONS, LLC 358   2003-08-12   
815-261 4   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2003-01-07   
815-261 5   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-01-20   
815-261 6   5562 METROPCS, INC. 358   2004-02-10   
815-261 7   5562 METROPCS, INC. 358   2004-12-27   
815-261 8   5562 METROPCS, INC. 358   2008-08-29   
815-261 9   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
815-276 A CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
815-276 0   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
815-276 1   5562 METROPCS, INC. 358   2006-09-10   
815-276 2   5562 METROPCS, INC. 358   2004-06-05   
815-276 3   5562 METROPCS, INC. 358   2003-05-11   
815-276 4   5562 METROPCS, INC. 358   2003-08-16   
815-276 5   5562 METROPCS, INC. 358   2003-08-16   
815-276 6   5562 METROPCS, INC. 358   2003-08-16   
815-276 7   5562 METROPCS, INC. 358   2003-03-02   
815-276 8   5562 METROPCS, INC. 358   2003-08-16   
815-276 9   6529 T-MOBILE USA, INC. 358   2006-06-15   
815-301 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
815-301 0   224C ONVOY, LLC 358   2023-09-11   
815-301 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
815-301 2   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
815-301 3   224C ONVOY, LLC 358      
815-301 4   224C ONVOY, LLC 358   2004-09-20   
815-301 5   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
815-301 6   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
815-301 7   5562 METROPCS, INC. 358   2004-10-18   
815-301 8   224C ONVOY, LLC 358      
815-301 9   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
815-356 A CRLKILCKDS0  9329 ILLINOIS BELL TEL CO 358      
815-404 A ELGNILOTGT5  5562 METROPCS, INC. 358      
815-404 0   5562 METROPCS, INC. 358   2005-03-19   
815-404 1   5562 METROPCS, INC. 358      
815-404 2   829J PAETEC ITEL, LLC 358   2004-08-26   
815-404 3   5562 METROPCS, INC. 358      
815-404 4   5562 METROPCS, INC. 358   2004-11-05   
815-404 5   460K FIRST COMMUNICATIONS, LLC 358   2005-02-26   

1 2 >>

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.