DefenceGeek US Air Force tank numbers hold steady Iran After rapid return of KC-135 and KC-46 tankers, numbers across Europe and CENTCOM are now holding relatively steady at ~193, with rotating airframes deployed for some time. Automatic translation into Persian The number of US Air Force refueling aircraft remains constant in Iran after the rapid return of KC-135 and KC-46 refueling aircraft, the numbers across Europe and the US Central Command are now relatively stable at around 193; at the same time, the transfer of aircraft stationed in the region for some time continues.