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.

Roscoe, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
779-315 A RCFRILRTX6Y  495J STRATUS NETWORKS 360      
779-315 0 RCFRILRTXXX  073H TELNYX LLC 360   2020-12-26   
779-315 1 RCFRILRTX6Y  495J STRATUS NETWORKS 360   2020-11-18   
779-315 2 RCFRILRTZMD  224C ONVOY, LLC 360   2023-06-05   
779-315 3 RCFRILRTZMD  224C ONVOY, LLC 360   2021-02-26   
779-315 4 RCFRILRTZMD  224C ONVOY, LLC 360   2021-02-26   
779-315 5 RCFRILRTZMD  224C ONVOY, LLC 360   2021-11-18   
779-315 6 RCFRILRTZMD  224C ONVOY, LLC 360   2024-03-03   
779-315 7 RCFRILRTZMD  224C ONVOY, LLC 360   2024-07-12   
779-315 8 RCFRILRCX9X  939H COMMIO, LLC 360   2022-12-10   
779-315 9 RCFRILRTZMD  224C ONVOY, LLC 360   2023-09-11   
815-270 A RCFRILRTXQY  792K CHARTER IP ENABLED SERVICES, LLC 360   2025-01-16   
815-270 0 RCFRILRTXQY  792K CHARTER IP ENABLED SERVICES, LLC 360   2007-06-18   
815-270 1 RCFRILRTXQY  792K CHARTER IP ENABLED SERVICES, LLC 360   2010-08-05   
815-270 2 RCFRILRTPMD  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 360   2017-10-16   
815-270 3 RCFRILRTZMD  224C ONVOY, LLC 360   2019-09-06   
815-270 4 RCFRILRCX3X  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 360   2017-10-02   
815-270 5 RCFRILRTZMD  224C ONVOY, LLC 360   2018-07-30   
815-270 6 RCFRILRTZMD  224C ONVOY, LLC 360   2019-09-06   
815-270 7 RCFRILRTXRX  508J CENTURYLINK COMMUNICATIONS, LLC 360   2016-02-20   
815-270 8 RCFRILRTZMD  224C ONVOY, LLC 360   2018-11-05   
815-270 9 RCFRILRTZMD  224C ONVOY, LLC 360   2020-05-21   
815-623 A ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 0 RCFRILRTZMD  224C ONVOY, LLC 360   2020-05-21   
815-623 1 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 2 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 3 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 4 RCFRILRTX4Y  318J COMCAST IP PHONE, LLC 360   2006-08-09   
815-623 5 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 6 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 7 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 8 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-623 9 ROSCILXADS0  1015 FRONTIER NORTH, INC. - IL 360      
815-696 A FRPTILBUDS0  443F AERO NORTH COMMUNICATIONS, INC. - IL 360      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.