FlightAware also uses ADS-B: https://flightaware.com/adsb/ https://flightaware.com/adsb/ Notably, right now ADS-B coverage is not very thorough, especially in

FlightAware also uses ADS-B: https://flightaware.com/adsb/ https://flightaware.com/adsb/ Notably, right now ADS-B coverage is not very thorough, especially in the US. Most aircraft are not equipped with ADS-B transmitters. The restricted feeds like the one the FAA supplies are still essential to getting thorough coverage in some areas.