wichita.edu
…Institutions, course levels are to be identified by the first digit catalog course number as follows: 000-099 No credit courses. 100-299 Lower division, undergraduate. Designed as freshman-sophomore courses. 300-499 Upper division, undergraduate. Designed as junior and senior courses. 500-699 Upper division, undergraduate. Primarily for juniors and seniors, …
https://www.wichita.edu/academics/academic_affairs/PVPAARForms/curriculum_change_guidelines.php