Historical aircraft types

REG	type	ICAO
N37506	B39M	a448d5
N14536	A21N	a0b823
N24516	A21N	a2452c
N14531	A21N	a0b81e
N437UA	A320	a53ee2
N471UA	A320	a5c694
N24519	A21N	a2452f
N431UA	A320	a52898
N14530	A21N	a0b81d
N470UA	A320	a5c2dd
N14503	A21N	a0b7b7