5xxx is a an aircraft in military operations. .
Could this be a KMFD thing with all the military ops as I routinely get 5xxx for my XC's?
I'd hardly doubt anybody would be intimidated by the hardware I pack in my Sundowner nor would you want the country's safety in the hands of it's performance
Out my way, I know 0101 through 0149 is for local VFR flights not leaving KJAN airspace and 0150 and higher are IFR flights not leaving KJAN airspace. I believe as Warrior5B explains that local helicopter operations such as medivac / police or news have a permanent squawk code that they use rather then random assigned numbers.
Yep, that is what I was talking about. 0101 through 0177 would be a subset for KJAN local area use. The facility has further broken down that subset for local VFR (0101 through, I'm guessing
) and local IFR (0150 through 0177).
As far as 54xx, more than likely that block is designated for Nellis' local use. 5401-5477 is probably available for use by other, geographically separated, facilities too.