Historical aircraft types

REG	type	ICAO
N538DN	A21N	a6ce7d
N503DZ	A21N	a64578
N511DE	A21N	a66576
N549DN	A21N	a6f9b3
N515DE	A21N	a67452
N504DZ	A21N	a6492f
N550DN	A21N	a6ffc3