KZLS 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
KCRC in Enid authorized to move from 1390 to 1640 kHz. 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. The new expanded band station on 1640 kHz was assigned the call letters KBFQ on May 15, 1998. In June 2000, the station changed its call sign to KMMZ and a few months later on November 24, 2000, to KMKZ. The station then reverted to KMMZ on September 15, 2003, and on February 16, 2004, became KFNY. On March 30, 2005, the station became KFXY, and then took on the KOAG call sign on January 1, 2013. On September 27, 2013, it was assigned the call sign KZLS, which had previously been used by a sister station at
99.7 FM. On February 19, 2014, KZLS was planned to adopt a
news/talk format. In 2022, after the
conservative talk format of 1640 The Eagle moved to 96.9, the station flipped to
sports using
Fox Sports Radio and simulcasting with KCRC. ==References==