That’s an amazing question. And you know what there is actually a tool that can help you detection the host of a website.
So I came across Hoo’s Hosting which is a lightweight hosting detector that helps you detect the hosting service used by a domain.
You just have to enter the domain (example.com) in the tool and Hoo’s Hosting will detect the hosting service.
You can also add Hoo’s Hosting’s chrome extension for finding the host.