There are current two VC-25s that provide primary duty, though any Air Force aircraft on which the POTUS is a passenger uses the AF1 call sign.
Those two planes are usually SAM2800 and SM2900 (their tail numbers) any other time they’re in the air, though they can chose another if they want to.
So many aircraft can serve as this “flagship”, and the usual suspects are told they are not “flagships” most of the time.
“Traditional” AF1
AF1 that flew out of Southampton, with its short runway. A C-32/modified 757.
