Go to the U.S. Department of Education Database of Accredited Postsecondary Institutions and Program homepage.
Click on the "Click here to begin your search" button in the upper right corner.
Enter the name of the online university in the "Name of Institution" field.
Click on the "Search" button at the bottom.
Choose the online university you're looking for if more than one option is returned. Schools often have similar names, so you want to ensure that you're actually getting the information you need for the right school.
Click on the name of the online university for more information about the accrediting body and to see whether the school has any specialized accreditation.