Most quality datacenter providers don't even do dedicated servers. If you asked Equinix for a dedicated server, they would probably tell you to shove it. Some colo providers also do dedicated servers to a large degree, but many, including the one I colocate with, are pure colo.

Some colo providers also do tiny amounts of dedicated server stuff at the request of specific customers. Occasionally you'll have a colo guy who has some servers he seized from a non-paying client, and he might try and sell dedicated hosting on them.

In these cases, you're talking a fairly bare-bones offering, with no control panels et cetera; just an IP address that you ssh.