Type,Description,Reference
0,Defined by Type Extension,[RFC5497]
1,Defined by Type Extension,[RFC5497]
2-4,Unassigned,
5,ICV,[RFC7182]
6,TIMESTAMP,[RFC7182]
7,Defined by Type Extension,[RFC7181]
8,Defined by Type Extension,[RFC7181]
9-223,Unassigned,
224-255,Reserved for Experimental Use,[RFC5444]