Hi Have never done such a thing, but you could just run a for loop with an ID and then hash it. for(int i = ID; ID < limit; ID++) { // gethash() gives you a 9 digit number - theoretically not unique but very close. // collisions in hash is very rare string hash = ID.gethash().toString(); // if needed longer just do it again hash = hash.gethash().toString(); // format the string to look like xxxx-xxxx-xxxx-xxxx (insert the '-' etc) } Not pretty, but it would work.