I can't make heads or tales of that brand. I know that the BLM does not use numbers the first two bars indicate the USA and the one right after indicates year. Which it loos like for this horse would be 01 maybe, 02. That is going off the information provided on this site How To Read A Brand
If he is a mustang that you should have a title on him. That title would be able to tell you where he was caught. Which is the really interesting part.