You can message them and get your number if you need it right now (if you really want to go to ISU and waiting to send your deposit elsewhere). Last month I was at 127 and as of Monday morning I'm at #48 (position 72 with 24 in front of me with no replies and this was the last day to reply). I ended up withdrawing myself earlier this week anyway since I decided on MSU.
Again, don't message them unless you were in my situation. If you really are seriously considering ISU and are waiting to send in your deposit elsewhere then they'll be happy to let you know where you stand on the list early. If not, just wait a few more days and you'll have your official number.
Good luck to everyone on the list. From the info she gave me on previous years, a lot of you will be called off.