Some online air traffic control radars are RadarBox24.com and FlightRadar24.com. RadarBox24.com collects data from RadarBox receivers around the world, and its server processes over 20 million automatic dependent surveillance-broadcast messages used by aircraft daily. It also receives and displays flight data from the Federal Aviation Administration's radar systems.
FlightRadar24.com offers real-time flight tracking information. This website accesses a network of 7.000 ADS-B receivers around the world and receives ADS-B flight information from aircraft. It also provides coverage of the American and Canadian airspace through the data provided by FAA. Due to FAA regulations, the FAA data has a time lag of up to five minutes.