If you work there, try to find out how many channels they have and what their uses are. That way, when we find the frequencies, it will be easier to lay out their system. No licenses in the FCC database (did a nationwide search and found 19 hits, none in OKC). In my hometown in Maryland, FedEx uses DPL tones and has a few low-power repeaters. All of those 19 hits in the database were UHF in the business band, some repeaters and some base-mobile only. If I get down there anytime soon, I'll see what I can find. By the way, what are their approximate shift times (when there would be a lot of activity)?