How to find the real server company? [on hold]

        There are hosting companies which allows other individuals/companies to partner up with them and get commission for per hosting sale. Let's call the original company X here and the partnered individual as Y. Now Y sets a website where we sell hosting service (In reality those hosting would be of X) It's kind of reselling.

My question is, how do we figure out who is X in such situation? Y if the person who simply promotes his websites and get users and there is usually no mention of X. How can a user know who really X is? The reason I have put this here on network eng stackexchange is because I believe it has something do to behind the scenes with networks. Posted this in serverfault as well, if anyone knows and would love to answer there. Here's the link https://serverfault.com/questions/993626/how-to-find-the-real-server-company Please let me know if I was not clear enough, I would explain.