Well, hard to say since I have seen paint quarter horses, thoroughbreds, standardbred, etc... we could make guesses depending on his height, since he is taller, he could come from thoroughbred stock. Whichever he is though, I love the black and whites!
Paints come in many shapes and sizes. Some are slender some are stocky. Pinto is a 'color' breed and can be horses of jsut about any breed. I like his markings they are pretty. What horses are popular in your area / he is most likely one of those breeds.