There are several ways to find out who has your FSMO roles in your Active Directory environment, but the easyest way is to run this:

“NetDOM /query FSMO”

Run the command from CMD or PowerShell.

If you want to user more time to find the FSMO roles use this guides 🙂

http://blogs.technet.com/b/mempson/archive/2007/11/08/how-to-find-out-who-has-your-fsmo-roles.aspx