KRJO

KRJO originated as the expanded band "twin" of an existing station on the standard AM band. On March 17, 1997, the Federal Communications Commission (FCC) announced that eighty-eight stations had been given permission to move to newly available "Expanded Band" transmitting frequencies, ranging from 1610 to 1700 kHz, with KMLB in Monroe authorized to move from 1440 kHz to 1680 kHz.

A construction permit for the expanded band station was assigned the call letters KBJE on September 4, 1998. The FCC's initial policy was that both the original station and its expanded band counterpart could operate simultaneously for up to five years, after which owners would have to turn in one of the two licenses, depending on whether they preferred the new assignment or elected to remain on the original frequency. However, this deadline was extended multiple times, and both stations continued to be authorized beyond the initial time limit.

In November 2006, the Noe family reached an agreement to sell KNOE on 540 kHz to Clay Holladay's Holladay Broadcasting. At the time, the FCC noted that "The conditional grant... required Holladay to surrender the license for the station that at the time bore call sign KMLB (AM) ('Old KMLB'), Monroe, Louisiana, prior to Holladay consummating its acquisition" of KNOE. Thus, the original KMLB on 1440 AM was taken off the air, with its license surrendered to the FCC on March 4, 2008. Thirteen days later, the call letters on 540 AM were changed from KNOE to KMLB, and programming previously on 1440 AM was consolidated to the transferred KMLB.

99.7 My FM

On July 11, 2016, KRJO changed their format from classic country to hot adult contemporary, branded as "99.7 My FM", simulcast on FM translator K259CU 99.7 FM Monroe.

Return to classic country

On April 5, 2020, KRJO changed their format back to classic country, branded as "99.7 The Legend" after three years with hot adult contemporary.