A loan servicer is a company that handles the billing and other services on your federal student loan. Visit the National Student Loan Data System (NSLDS) at www.nslds.ed.gov to view information about all of the federal student loans you have received and to find contact information. You should contact your loan servicer when you: need help making your loan payment, change your name, address or phone number, have a question about your bill, have a question about features of your student loan, graduate, drop below half-time enrollment, stop going to school, or transfer to another school.