Flightradar24

Flightradar24 is a Swedish Internet-based service that shows real-time aircraft flight tracking information on a map. It includes flight tracking information, origins and destinations, flight numbers, aircraft types, positions, altitudes, headings and speeds. It can also show time-lapse replays of previous tracks and historical flight data by airline, aircraft, aircraft type, area, or airport. It aggregates data from multiple sources, but, outside of the United States, mostly from crowdsourced information gathered by volunteers with ADS-B receivers and from satellite-based ADS-B receivers. The service is available via a web page or mobile device apps. The Guardian considers the site to be "authoritative". It is the largest ADS-B network in the world with more than 40,000 connected receivers, more than 200,000 flights tracked per day, and more than 4 million users per day. It is also used by most major airlines and others in the aviation industry, including Airbus, Boeing, and Embraer.