Historical aircraft types

REG	type	ICAO
N533DT	A21N	a6bbef
N507DZ	A21N	a65454
N515DE	A21N	a67452
N502DX		a641bf
N822DN	B739	ab38a1
N592DT	A21N	a7a532
N574DT	A21N	a75da2