| 1 | ICMP |
| 2 | IGMP |
| 3 | GGP |
| 4 | IP |
| 5 | ST, STII |
| 7 | Transport layer multicast routing protocol |
| 8 | EGP |
| 11 | NVP |
| 20 | HMP |
| 27 | RDP |
| 28 | IRTP |
| 29 | ISO-TP4 |
| 30 | NETBLT |
| 35 | IDPR |
| 38 | IDPR |
| 42 | SDRP (Source Demand Routing Protocol) |
| 46 | RSVP |
| 47 | GRE |
| 50 | |
| 51 | |
| 54 | |
| 55 | Minimal Encapsulation Protocol |
| 58 | MLD |
| 81 | VMTP (Versatile Message Transaction Protocol) |
| 89 | OSPF |
| 92 | Multicast Transport Protocol (MTP) |
| 98 | ENCAP |
| 101 | IFMP |
| 103 | Protocol Independent Multicast (PIM) |
| 108 | IPPCP |
| 112 | VRRP (Virtual Router Redundancy Protocol) |
| 115 | L2TP |