The REG indicating that it should be some kind of commercial aircraft. And in that case I would expect a flight id too. But if it's a miscoded small airframe a flight isn't necessarily received, especially if the airframe is at the edge of my reception range.
With low message count and airframe received on only one box decoding error or a scrambled packet would be my first guess. But in this case I got it at the same time on two boxes with quite high message count. Therefore I thought that it might be something else.
As usual in that kind of cases: time will tell...
Ingo
