Is this regarding permium? By the looks your account has been upgraded to premium hosting.
If that is the case I can not actually look up on what server your account is located, but the information should be available in the clients area, it should also be the same address as you use for cpanel through the computer, minus the portnumber.
If that doesn't work, or if you have further questions, I would recommend sending in a ticket through your clients area as the people replying there would have your accountinformation readily at hand.