The station is owned by Hubbard Broadcasting and maintains studios in the TJ Maxx–anchored shopping center on Salem Road in Rochester, Minnesota.

Its primary transmitter is located in Grand Meadow Township, with a digital replacement translator in Garner, Iowa, near Mason City.

[6] From studios south of Austin on MN 105, shared with KAUS radio, KMMT signed on the air on August 17, 1953.

[6] It also broadcast local news and sports coverage; one early program, Circle 6 Ranch, featured country music artist Johnny Western singing songs and presenting films.

[10] The CBS and DuMont affiliations in the area moved to KGLO-TV in Mason City, Iowa, when that station began in May 1954.

[14] During this time, the station began airing the long-running Family Hour, a Christian program hosted by pastor Joe Matt; the 15-minute show remained on the air on channel 6 until 2001, ending its run as the longest-running local TV show in the United States.

[15] In 1959, KMMT increased its power to the maximum of 100,000 watts; this expanded the station's coverage area as well as that of ABC, which had no nearby affiliates.

[25][26] Withers retained the radio studio facility, and KAAL moved the next year to a new site in Austin, a former Volkswagen dealership located on 10th Place NE.

In 2008, the station opened a new Rochester office on Superior Drive NW, which included equipment allowing for a newscast to be presented from both cities.