What are CRNs and course numbers?
Posted by ATC Staff, Last modified by SHeD Staff 3 on 30 August 2018 02:43 PM

Description: Explanation of CRNs and course numbers
Tags: crn, numbers, crn numbers, course number

What are CRNs and course numbers?

CRN (Course Reference Number)

The CRN is a five-digit number that identifies a specific section of a course. The first number in the CRN is the term for the course:

1 - summer

2 - fall

3 - winter

4 - spring

The rest of the number identifes the class and instructor.


Course Numbers:

Course number can be reused term by term and are used to identify the content covered in a course. 

  • Credit courses have a course number that includes letters and numbers (e.g. WR 121, ART 115).
  • Pre-college credit courses have course numbers below 100, and do not transfer to a 4-year institution.
  • Non-credit course numbers have letters and numbers in the format XART 5785. The "X" before the subject and the four-digit numbers identify the course as non-credit.



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