"Performance Racing Network"@en . "1981Z"^^ . . . "The Performance Racing Network (PRN) is a radio network controlled by Speedway Motorsports.Since 1981, PRN has aired all NASCAR-sanctioned Sprint Cup and Xfinity Series events held at Speedway Motorsports-controlled tracks which include Atlanta, Bristol, Charlotte, Kentucky, Las Vegas, New Hampshire, Sonoma and Texas, along with the Indianapolis Motor Speedway, where they co-produce and syndicate (in non-conflicting markets with the IndyCar Radio Network) for the Brickyard 400, where their staffers work both races. "@en . . . . "70"^^ . . .