In New York City, the station on 101.9 FM has undergone probably more format changes than any other station in the Northeast. From 1971 through 1988, WPIX-FM went through
11 different formats. Wikipedia has
a list of those formats. Then, in 1988, the station became smooth jazz station WQCD. The smooth jazz format lasted nearly two decades.
By 2008, the audience for smooth jazz had declined, so it changed its format to alternative rock with the call sign WRXP, thereby filling a void that was left by WXRK in 2005. In 2011, it became NYC's third all-news station, with the call sign WEMP. That didn't last long, so in July 2012, it reverted to alternative rocker WRXP. Finally, in November 2012, the station, which was being sold to CBS Radio, began simulcasting all-sports station WFAN (660 AM) and changed its call sign to WFAN-FM.