2 things you could do if you’re just wanting to know your net mineral acres. Call the lessee; they will normally tell you if you are the owner. Also, call the county assessor; they will be able to help you by looking at the surface acres, but the first option is the best method. Or you could do it the hard way by figuring it yourself. Since they are broken up tracts, it is a lot more difficult to figure based on dimensions.