The easiest way to find out which Active Directory Domain Controller holds the FSMO roles is the following:

• Open a CMD box
• Type netdom query fsmo
• The output is something like
  

  C:\Windows\system32>netdom query fsmo

  Schema master               DC1.ad-domain.local
  Domain naming master      DC1.ad-domain.local
  PDC                         DC1.ad-domain.local
  RID pool manager            DC1.ad-domain.local
  Infrastructure master       DC1.ad-domain.local

  The command completed successfully.