MIDI Remote Mapping

Is there any way to determine (print/display) all existing MIDI Remote key mappings and their CC# assignments?

I am hoping to add additional mappings, but I don’t know any way to verify that the CC# I’m choosing has not already been used.

One option is to use NPRN for my additions. However, there is still no assurance that the number(s) I pick are not duplicates already assigned.