nascar on nbc, also known as nbc nascar, is the brand of nascar coverage on nbcuniversal networks, nbc, nbcsn, usa network and cnbc (for 2016 only), the networks aired the final 20 races of the monster energy nascar cup series, final 19 races of the xfinity series, nbc had covered the monster energy nascar cup series and xfinity series from 2001 to 2006, with nbc airing the ford ecoboost 400 at homestead in 1999.