If you don't know your UIN, there are a number of places you can look. If you were last affiliated with the University of Illinois before 1996, your account may not have a UIN assigned to it.
If you have a University of Illinois ID card, your UIN is the 9-digit number printed below your name.
If your account was at any time labeled as a student, you will likely be able to find your UIN in Self-Service:
If you are a newly-admitted student, you should have been contacted at the same email address you used for the application process with messages giving you your UIN and an activation code to claim your NetID.
If you know that you are admitted to the University but did not receive these messages, reach out to the Office of Admissions at email@example.com or 217-333-0302.
If you are a newly-admitted student, you can also see your UIN at the top of your Admitted Checklist in myIllini.
myIllini can be reached at https://myillini.illinois.edu/
If you're unable to use any of the above options, reach out to the Technology Services Help Desk at firstname.lastname@example.org or 217-244-7000. If we are able to look up your University account with other information you provide, and can trust that you are the person it is for, we can tell you your UIN.