If you need something working right now, there's a feature in SSMS that might help you here. If you have a group of registered servers, you can right-click the name of the group and click New Query. This will open a new query window that will execute against all the servers in the group. The Server Name will be returned with your query results.

I know this isn't a long-term solution to your problem, but it'll get you what you're after and you sounded like you need it quickly.

HTH