Aircraft: tar1090-db, VRS Standing Data
Airlines: VRS Standing Data
Airports: FlightAware*, VRS Standing Data
Flight Schedule Data: Amadeus, FlightAware*, FlightRadar24, VRS Standing Data
Live Flight Data: Own Data, adsb.fi, adsb.lol, ADSBHub
Live Flights - Auxiliary Data: FlightAware*, FlightRadar24
* Sources marked with a star are only used for non-public projects due to licensing restrictions