National Indoor Football League was created in 2001.
Eastern Indoor Football League was created in 2007.
National Indoor Football League ended in 2008.
Indoor Professional Football League was created in 1998.
United Indoor Football League was created in 2010.
Continental Indoor Football League was created in 2006.
World Indoor Football League was created in 1988.
Newman National Football League was created in 1972.
National Football League was created on 1920-08-20.
Fortescue National Football League was created in 1956.
Indoor Professional Football League ended in 2001.
National Football League Players Association was created in 1956.
Korean National Youth Football League was created in 2009.