The station went on the air on June 15, 1968,[1] as WKDR.[5] It became WNWX on June 1, 1993. On April 14, 1995, the station changed its call sign to WZBZ; on January 23, 1998, to WDOT; on July 15, 1999, to WGLY; on February 23, 2001, to WLFE; on April 23, 2002, to WTWK and on January 15, 2017, to WPLB.[6]
A & J Radio acquired WTWK from Radio Broadcasting Services (a subsidiary of Northeast Broadcasting) for $140,000[7] on October 24, 2016.[8] At the time of the sale, the station was running a business news format supplied by Bloomberg Radio.[9] In January 2017, after briefly simulcasting WZXP (a country music station operated by A & J Radio but owned by Radioactive, LLC), the station introduced an oldies and classic country format, which was transferred from former sister stations WCAT and WRSA.[10]
A & J Radio merged with Border Media to form Loud Media in 2020.[11] On June 13, 2020, WPLB dropped its oldies format for a classic hip hop format using Loud Media's JUMP brand. The station is branded as JUMP 103.7.[12] The WJMP call letters were moved here from 1120 AM in Maryville, Tennessee, on October 1, 2021.