57-1419
57-1419 is the tail number of an individual KC-135R Stratotanker operated by the Arizona Air National Guard. 57-1419 was built in 1957 and is the oldest aircraft in active United States military service. As of 2013, 57-1419 had 22,300 flight hours and was in service with the New Hampshire Air National Guard's 157th Air Refueling Wing. In 2019, the aircraft was transferred to the Arizona Air National Guard.