KLJX-LP ("KJACK", 107.1 FM) is a student-run college radio station serving the Northern Arizona University campus in Flagstaff, Arizona, United States.

The station broadcasts a variety of music in a freeform format, as well as campus and high school sports coverage.

KJACK is run by the students of Northern Arizona University, with students hosting shows in one-hour blocks featuring music, sports, pop culture, politics and news.

In 2013, the station applied to the FCC for an FM broadcasting license.

[3][4] The station hosts an annual arts festival in downtown Flagstaff and[5][6] broadcasts NAU's D2 and D3 hockey games.