If you want to know the ISP or the name of data center where your server is located we would highly recommend the following site
The subject site not only locates the ISP of the site hosted but also shows the country where the server is located. The IP address or the domain of the website can be used to locate the server and find the parent company if any. The above example shows the popular hosting company in Pakistan whose website is located on a server in France by OVH.