Customer Service Hours 

Monday through Friday, 8am to 5pm MT

(These hours will remain in effect until March 15, 2021)

Contact Numbers

Toll Free: (800) 663-1662
Fax: (801) 366-8400

Servicemembers: (844) 255-8326

Email Address (General Questions Only)

Servicemember email:

      Correspondence Address

CornerStone Education Loan Services

P.O. Box 145122 Salt Lake City, UT 84114-5122

Payment Address

U.S. Department of Education


PO Box 979133 St. Louis, MO 63197-9000

Advocate Websites