The Indianapolis Motor Speedway Radio Network (known typically as the IMS Radio Network), is an in-house radio syndication arrangement which broadcasts the Indianapolis 500, the Verizon IndyCar Series, Indy Lights, and the Brickyard 400 to radio stations covering most of North America. The network, owned by the Indianapolis Motor Speedway and headquartered in Speedway, Indiana, claims to be one of the largest of its kind in the world. It currently boasts over 400 terrestrial radio affiliates, plus shortwave transmissions through AFN and World Harvest Radio. The network is carried on satellite radio through Sirius/XM, and is also accessible through online streaming, and downloadable podcasts. As of 2014, the network claims an audience of 11 million listeners.