For what it's worth, I allocate one scanner just to monitor all 127
airline operational frequencies in the 128.85-132.0 range. I also
include 122.95 since it's used by FBO's for civilian aircraft. I program
in all of the frequencies for the convenience of never having to be
concerned with a new frequency being added at some location.

All I listen to is aircraft, but even for radio hobbiests that don't,
these frequencies have a little bit of everything to listen to over the
course of a week. While the majority of the comms are routine, there's
numerous phone patches to be heard which involve every subject
imaginable.

Mark Holmes
Marion, IL