Anonymous on "how do i find my FTP address"

Ok I have a question how can I find my fpt account.
I have hosting, and on my hosting is this domain name: http://professionallowcostwebhosting.com/ but the problem is that I have multiple domain name.
And one of the domains that I am trying to get the ftp is: http://get-exback.net/ this is and addon domain and I don't know how.
Dose anybody know how can I find out that?

Thank you.