http://arrrrv3dzzoluxubt3p24lpn7qu4rxuem3fb4kcmboji3dgpkgt4b2ad.onion/worter/1090-things
Respecting this, I found that
Paul Little has a nice sqlite3 database of airframes and corresponding ICAO codes hosted at the Manchester TMA Overflights group . The FAA aircraft registry is also a good source to find out more about aircraft in the US. Here is a quick command line statement to fetch some information about ICAO code A7367F:
>
te3 -csv basestation_latest/basestation.sqb "select modes, Registration, ICAOTypeCode, Operatorflagcode from aircraft where ModeS = 'A7367F';"...