To a certain extent, you can query if the Domain Admins are in the group of the builtin\administrators. Try this:
exec xp_logininfo 'BUILTIN\Administrators', 'members';
Note: it returns only the highest privilege level of Windows user or group.
For example, if there is a Windows group "MyDomain\DomainAdmins" that belongs to group "BUILTIN\Administrators", then you will see group "MyDomain\DomainAdmins" in the above xp_logininfo result. But you won't be able to see the windows groups or users who are in the group of "MyDomain\DomainAdmins".