Z Rock was a nationally syndicated radio network based out of Dallas, Texas, USA, in the mid-80's through the mid-90's that played Hard Rock & Heavy Metal music. Z-Rock debuted Labor Day 1986 and has been credited with being the 1st nationally focused radio station. In March 1990, Z Rock was nominated for Billboard Awards, the only full time Hard Rock/Metal programming ever nominated in the history of Billboard Magazine. After several changes in personnel & programming direction, the network was discontinued on December 31, 1996. During its early days the station drew attention for playing unedited, explicit versions of album tracks.