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The station was assigned the call sign WVRS on March 24, 1983. On March 1, 1984, the station changed its call sign to WTIJ, and signed on February 14, 1985. On May 31, 1986, it changed to WGLY-FM. The station began with a predominantly religious format, airing blocks of Christian talk programs and music. The WTIJ call sign stood for "We Trust In Jesus", while WGLY stood for "God Loves You". The station became an affiliate of Moody Radio airing a format of Christian music, lecture, campus chapel, listener-interactive talk, and devotionals. The religious format was flipped to WCMK 91.5 in Bolton, Vermont—which also took the WGLY-FM callsign—when the station was purchased by Radio Broadcast Services Inc. in 1999.
On July 9, 1999, the call sign was changed to WDOT; it became WLKC on September 28, 1999 (with an adult contemporary format); and WWMP on June 13, 2005. With its "MP 103" branding and no on-air DJs, the station patterned its adult hits format as an over-the-air MP3 player. In 2018, WWMP rebranded as "Free 103.3" with no change in format.
On October 17, 2019, WWMP changed its format from adult hits to mainstream rock, branded as "Rock 103.3".
On September 12, 2024, WWMP dropped its mainstream rock format, which moved to WIXM (102.3 FM), and began running a loop redirecting listeners to 102.3. The two stations swapped call signs on September 18. On November 19, the loop was replaced with Christian worship music programming from Air1, ahead of a planned sale of WIXM to the Educational Media Foundation; Air1 programming previously aired in Burlington on W235BE (94.9 FM) and the second HD Radio channel of WGLY-FM.