You can have your information blocked from public directory information with a nondisclosure request.
Public information includes:
Send a signed request to University Registrar before the first day of classes.
Email: Registrar@IllinoisState.edu
U.S. Mail: Registrar Service Center
PO Box 2202
Normal IL, 61790
A nondisclosure block will call for Illinois State University not to release any of this directory information; thus, any future requests for such information from non-institutional persons or organizations will be refused.
Illinois State University will honor your request to withhold directory information but cannot assume responsibility to contact you for subsequent permission to release this information. Regardless of the effect upon you, Illinois State University assumes no liability as a result of honoring your instructions that such information be withheld.
Although the initial request may be filed at any time, requests for nondisclosure will be honored by the University until removed, in writing, by the student.