The station was assigned the callsign WVRS on March 24, 1983. On March 1, 1984, the station changed its callsign to WTIJ; on May 31, 1986, it changed to WGLY-FM.[3] The station began with a predominantly religious format, airing blocks of Christian talk programs and music. The WTIJ callsign stood for "We Trust In Jesus", while WGLY stood for "With God's Love to 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.
"MP103" logo (2010–2018)"Free 103.3" logo (2018–2019)
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.[3] 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.[4]
On October 17, 2019, WWMP changed its format from adult hits to mainstream rock, branded as "Rock 103.3".[5]