I don't know what you need... How much datatraffic each month ? Specifications of the server ? Budget ?
I have my own colocated server. Thinking about moving it to
www.transip.nl . I am a customer there already and they always promptly reply to even the smallest and most stupid questions :-) They do so already for several years and now they also have their own datacentre. I am only surprised to see their website is only in Dutch. They have a dedicated server
https://www.transip.nl/dedicated-server/ The page is mainly in Dutch, but I think the most important information is also easy to understand for English speakers.
If I can help you in any way just let me know.