In the 4 months I’ve had my receiver, I’ve seen very little (if any) activity that I consider notable. However, this afternoon I noticed this aircraft tracked via MLAT. tar1090 indicates it’s from France and is cruising at the unusually high altitude of FL470. Although the transponder squawk code is listed, there is no flight plan or registration information. All of these things are highly unusual relative to what I normally see here over West Michigan.
Does anyone have an idea of what this aircraft may be and why so little info is available?