Once a year WFNK has a 1000 song countdown of the greatest Frank FM songs, ending with the #1 song on Memorial Day. The station also plays its classic hits library from A to Z every September. WFNK is also known for its long-running campaigns in support of Portland's Barbara Bush Children's Hospital and Maine's Make-a-Wish chapter.
In March 1973 107.5 launched as rocker WBLM and by 1989 switched calls and frequencies with 102.9 WTHT and became Thunder 107 playing contemporary hit radio. WTHT's next format was oldies and a few years later went country first as New Country WTHT 107-point-5 and then 1075 The Wolf. On Tuesday April 6, 2004 WTHT began running a repeating loop telling one that 1075 The Wolf has moved to 99.9. A week later WTHT became current WFNK.