What is a CRN?

Each class offering of any course has its own unique identification number.

This is referred to as the CRN (or Course Reference Number). Typically, the CRN consists of 5 digits for Spring or Fall semesters and 4 digits for summer semesters.

For example, you might register for a fall section of an online Accounting 101 course which has a CRN of 20001.