 KLZ was first licensed as a broadcasting station on March 10, 1922 to the Reynolds Radio Company in Denver, Colorado.However, the company's president, Dr. William D. "Doc" Reynolds, Jr., had been making earlier experimental broadcasts, and the station has traditionally traced its founding to 1919 or 1920.In September 1915, Reynolds, then living in Minneapolis, Minnesota, was issued his first license, for an amateur radio station with the call sign 9WH.