This report will provide you with a list of the Sublets that are in your Blackpurl
From the Blackpurl Header > Reporting > Reports > Sublets
The search result will list all active sublets in your Blackpurl
If you want to review a sublet, simply click on the CODE name
If you want to change the parameters, click on 
If you are looking for a report to track any active Service Sublets in the system. please review our article - Reporting - Active Service Sublet
For further tips on reporting, click on this link - Reporting Tips - Totals / Changing Columns / Changing Parameters / Exporting Search Results