I noticed quite a few SharePoint content databases with random names (i.e. WSS_Content_30cb56f0b9eb430a8a2e3180604efd7b). I believe these were created by developers during deployment, and were never removed. I realize this may be a question I should ask a DBA: How do I determine whether these databases are being used?
If you would like to know what DB is used for a site collection you can go to the central administration, open aplication managment, then click on view all site collections. Select a site collection that you wish to check. There is information what DB is used for this site collection.
The reason why I told about site collection is site collection is the smallest piece that can store in the separated DB.