You can see all of Mullvad's servers here. Check the third line for every server listing, that's the provider. M247 currently hosts 162/647 of Mullvad servers.
If you are uneasy about that, just use the servers, that are owned by Mullvad.
Discussion
That’s true, the issue is a lot of those other servers are also large international datacenter providers as well. And there is the fingerprinting issue discussed in our article