Value,Name,Reference
0,One-byte Padding (encoded with no Length nor Data field),[RFC5944]
1-15,Unassigned,
16,Mobility Agent Advertisement,[RFC5944]
17-18,Unassigned,
19,Prefix-Lengths,[RFC5944]
20,Link-Layer Address Option Format (LLA),[RFC4988]
21,New IPv4 Address,[RFC4988]
22,New Router Prefix Information,[RFC4988]
23,Unassigned,
24,Challenge Extension,[RFC4721]
25-126,Unassigned,
127,Non-skippable Adv. Extension for Experimental use,[RFC4064]
128-135,Unassigned,
136,NAI Carrying Extension,[RFC3846]
137,CARD MN-AR signature option,[RFC4065]
138,CARD Request option,[RFC4065]
139,CARD Reply option,[RFC4065]
140,Generalized Link Layer Address Advertisement Extension,[RFC4881]
141-254,Unassigned,
255,Skippable Adv. Extension for Experimental use,[RFC4064]