ECCOA 193 804Berlin Berlin

This is Ecco Rail (ECCOA).

Yes, you are right, some locomotives change operators every year, it is difficult to track who currently owns it. Someone needs to edit it, I don't have permission to edit.
https://www.elektrolokarchiv.de/index.php?nav=1401007&lang=1&id..trait

@alex26 what I do is check the recent spots on forums like Drehscheibe, and recent photos on Flickr. Then it's a matter of connecting the dots and checking whether the train on a picture could correspond with the most logical operator.