"On Air with Ryan Seacrest" is operated by what company? 
John Hogan (executive): John Hogan was CEO and Chairmen of Clear Channel Radio until January 2014, when he retired. Ryan Seacrest:  Seacrest is known for hosting the competition show "American Idol", the syndicated countdown program "American Top 40", and the KIIS-FM morning radio show "On Air with Ryan Seacrest".
Clear Channel Radio