Type,Description,Reference
0,Administratively closed,[RFC7854]
1,Unspecified reason,[RFC7854]
2,Out of resources,[RFC7854]
3,Redundant connection,[RFC7854]
4,Permanently administratively closed,[RFC7854]
5-65530,Unassigned,
65531-65534,Experimental,[RFC7854]
65535,Reserved,[RFC7854]