KTDZ (103.9 MHz) is a commercial FM radio station licensed to College, Alaska, and broadcasting to the Fairbanks metropolitan area.

KTDZ has an effective radiated power (ERP) of 28,000 watts as a Class C1 station.

It aired an album rock format and was an affiliate of the NBC Source Network.

The power increased to 3,000 watts and the owner was Borealis Broadcasting.

In 2006, the station flipped to its current format under new owner Rob Ingstad.