You can find out what server you are on using three different ways, each one revealing which server you are on.
Method 1: Welcome Letter
If you stored your welcome letter, you will find  the server that you are on.  If you do not have the welcome letter, you can login to the Client Area and look at all e-mail that has been sent to you, which your welcome letter should appear.
Method 2: cPanel Login
Login to your cPanel account at cpanel.yourdomain.tld and you will see the server url in the address bar of your browser.
Method 3: A Trace Route
You can do a trace route to your main IP address or any active IP address hosted on your service. Usually, the hop before reaching your VPS is the server you are on.  We create a PTR (reverse DNS entry) for all of our nodes, so it is easy to identity which server you are on. 
