Beginning in 2019, the Indianapolis 500 race will be broadcast on NBC after 54 years on ABC, part of a new multi-year media rights deal between IndyCar and NBC Sports Group.
Under the pact, NBC Sports has acquired rights to present all IndyCar races, qualifying, practices, and Indy Lights races across its platforms beginning in 2019. Financial terms were not disclosed.
The Indianapolis 500 and seven additional Verizon IndyCar Series races will be broadcast annually on NBC, with all remaining races televised on NBCSN. All races will be live streamed to authenticated subscribers on NBCSports.com and the NBC Sports app. Details of NBC Sports’ 2019 IndyCar schedule will be announced at a later date.
Current TV rights are split between NBC and ABC. Most of the Indy races appear on NBCSN, while the Indianapolis 500 and a few other races air on ABC.
https://deadline.com/2018/03/indy-500-moving-nbc-after-54-years-abc-1202350643/