Frank FM is the branding used by Nassau Broadcasting Partners for their adult rock/variety hits radio stations. Some of these stations lean toward more of a classic hits format. The Frank format is similar to the Jack FM format in that these stations play over 1000 songs in regular rotation at any time as opposed to the average amount of 300 to 600 songs heard regularly on a radio station.
The Frank stations with a classic hits lean include (WFNK-FM Lewiston, WBYA-FM Islesboro), New Hampshire (WFNQ-FM Nashua), and Vermont (WORK-FM Barre).
Nassau also employs the branding on a variety hits simulcast on Cape Cod in Massachusetts (WFRQ-FM Mashpee, WFQR-FM Harwichport). This format is also similar to the pioneering Jack FM, running semi-jockless and playing a wide selection of music from the 60s through current with an emphasis on 1980's material. Unlike the Classic Hits leaning Franks, these stations play a couple new songs per hour.
In March 2009, former Pennsylvania (WFKB FM, Reading/Boyertown) went off the air after three years. That station is owned by a Christian broadcaster, WDAC Inc. Nassau never owned that station but managed it from the fall of 2005 to the spring of 2009. Its owner took back the station and reverted to the WBYN-FM calls and Christian music, preaching, and teaching programming due to Nassau's unwillingness to finance the LMA or purchase the station outright for the amount of money that WDAC Inc. wanted.
On April 27, 2009 a corporate reorganization occurred that required Nassau to divest two stations in the Concord-Lakes Region and those two were WWHQ and WNNH. They had been transferred to a divestiture trust. This caused the Frank FM simulcast of WNNH-FM Henniker and WLKZ-FM Wolfeboro to end on November 4, 2009. WNNH and WWHQ are now simulcasting their Maine classical stations after almost a year of silence. It appears the proposed sale to Great Eastern Radio has collapsed.