The NTT IndyCar Series is a professional open-wheel racing series that is sanctioned by the Indy Racing League (IRL). The series is the premier level of American open-wheel racing and features a mix of oval and road course races. The NTT IndyCar Series was founded in 1996 and is named after its title sponsor, NTT, a Japanese multinational telecommunications company. The series is known for its high-speed, high-stakes racing and features a number of iconic events, including the Indianapolis 500, which is widely considered to be the biggest and most prestigious race in American open-wheel racing. The NTT IndyCar Series attracts a number of top drivers and teams and has a loyal following among motorsport fans.