Hello, I live around the Columbia, MO area. Columbia has an airport and i can hear the aircraft talking on the frequencies but i can not find the frequency of which the air traffic controller is talking to them on. I think Kansas City,MO International Airport controls this airspace but i am unable to hear them talking to the aircraft. Does anybody else know why that could be. I would really if possible find a frequency that has the air traffic controller on it and the air craft but i have not had any luck. If anyone has any information please reply or send me a private message.