| Decimal |
Keyword |
Protocol |
References |
| 0 |
HOPOPT |
IPv6 Hop-by-Hop Option |
RFC 1883 |
| 1 |
ICMP |
Internet Control Message Protocol |
RFC 792 |
| 2 |
IGMP |
Internet Group Management Protocol |
RFC 1112 |
| 3 |
GGP |
Gateway-to-Gateway Protocol |
RFC 823 |
| 4 |
IP |
IP in IP (encapsulation) |
RFC 2003 |
| 5 |
ST |
Internet Stream Protocol |
RFC 1190, RFC 1819 |
| 6 |
TCP |
Transmission Control Protocol |
RFC 793 |
| 7 |
CBT |
CBT |
|
| 8 |
EGP |
Exterior Gateway Protocol |
RFC 888 |
| 9 |
IGP |
Interior Gateway Protocol (any private interior gateway (used by Cisco for their IGRP)) |
|
| 10 |
BBN-RCC-MON |
BBN RCC Monitoring |
|
| 11 |
NVP-II |
Network Voice Protocol |
RFC 741 |
| 12 |
PUP |
Xerox PUP |
|
| 13 |
ARGUS |
ARGUS |
|
| 14 |
EMCON |
EMCON |
|
| 15 |
XNET |
Cross Net Debugger |
IEN 158 |
| 16 |
CHAOS |
Chaos |
|
| 17 |
UDP |
User Datagram Protocol |
RFC 768 |
| 18 |
MUX |
Multiplexing |
IEN 90 |
| 19 |
DCN-MEAS |
DCN Measurement Subsystems |
|
| 20 |
HMP |
Host Monitoring Protocol |
RFC 869 |
| 21 |
PRM |
Packet Radio Measurement |
|
| 22 |
XNS-IDP |
XEROX NS IDP |
|
| 23 |
TRUNK-1 |
Trunk-1 |
|
| 24 |
TRUNK-2 |
Trunk-2 |
|
| 25 |
LEAF-1 |
Leaf-1 |
|
| 26 |
LEAF-2 |
Leaf-2 |
|
| 27 |
RDP |
Reliable Datagram Protocol |
RFC 908 |
| 28 |
IRTP |
Internet Reliable Transaction Protocol |
RFC 938 |
| 29 |
ISO-TP4 |
ISO Transport Protocol Class 4 |
RFC 905 |
| 30 |
NETBLT |
Bulk Data Transfer Protocol |
RFC 969 |
| 31 |
MFE-NSP |
MFE Network Services Protocol |
|
| 32 |
MERIT-INP |
MERIT Internodal Protocol |
|
| 33 |
DCCP |
Datagram Congestion Control Protocol |
RFC 4340 |
| 34 |
3PC |
Third Party Connect Protocol |
|
| 35 |
IDPR |
Inter-Domain Policy Routing Protocol |
RFC 1479 |
| 36 |
XTP |
XTP |
|
| 37 |
DDP |
Datagram Delivery Protocol |
|
| 38 |
IDPR-CMTP |
IDPR Control Message Transport Protocol |
|
| 39 |
TP++ |
TP++ Transport Protocol |
|
| 40 |
IL |
IL Transport Protocol |
|
| 41 |
IPv6 |
IPv6 |
|
| 42 |
SDRP |
Source Demand Routing Protocol |
|
| 43 |
IPv6-Route |
Routing Header for IPv6 |
|
| 44 |
IPv6-Frag |
Fragment Header for IPv6 |
|
| 45 |
IDRP |
Inter-Domain Routing Protocol |
|
| 46 |
RSVP |
Resource Reservation Protocol |
|
| 47 |
GRE |
Generic Routing Encapsulation |
|
| 48 |
MHRP |
Mobile Host Routing Protocol |
| 49 |
BNA |
BNA |
|
| 50 |
ESP |
Encapsulating Security Payload |
RFC 2406 |
| 51 |
AH |
Authentication Header |
RFC 2402 |
| 52 |
I-NLSP |
Integrated Net Layer Security Protocol |
TUBA |
| 53 |
SWIPE |
IP with Encryption |
|
| 54 |
NARP |
NBMA Address Resolution Protocol |
RFC 1735 |
| 55 |
MOBILE |
IP Mobility (Min Encap) |
RFC 2004 |
| 56 |
TLSP |
Transport Layer Security Protocol (using Kryptonet key management) |
|
| 57 |
SKIP |
SKIP |
|
| 58 |
IPv6-ICMP |
ICMP for IPv6 |
RFC 1883 |
| 59 |
IPv6-NoNxt |
No Next Header for IPv6 |
RFC 1883 |
| 60 |
IPv6-Opts |
Destination Options for IPv6 |
RFC 1883 |
| 61 |
|
Any host internal protocol |
|
| 62 |
CFTP |
CFTP |
|
| 63 |
|
Any local network |
|
| 64 |
SAT-EXPAK |
SATNET and Backroom EXPAK |
|
| 65 |
KRYPTOLAN |
Kryptolan |
|
| 66 |
RVD |
MIT Remote Virtual Disk Protocol |
|
| 67 |
IPPC |
Internet Pluribus Packet Core |
|
| 68 |
|
Any distributed file system |
|
| 69 |
SAT-MON |
SATNET Monitoring |
|
| 70 |
VISA |
VISA Protocol |
|
| 71 |
IPCV |
Internet Packet Core Utility |
|
| 72 |
CPNX |
Computer Protocol Network Executive |
|
| 73 |
CPHB |
Computer Protocol Heart Beat |
|
| 74 |
WSN |
Wang Span Network |
|
| 75 |
PVP |
Packet Video Protocol |
|
| 76 |
BR-SAT-MON |
Backroom SATNET Monitoring |
|
| 77 |
SUN-ND |
SUN ND PROTOCOL-Temporary |
|
| 78 |
WB-MON |
WIDEBAND Monitoring |
|
| 79 |
WB-EXPAK |
WIDEBAND EXPAK |
|
| 80 |
ISO-IP |
International Organisation for Standardization Internet Protocol |
|
| 81 |
VMTP |
Versatile Message Transaction Protocol |
RFC 1045 |
| 82 |
SECURE-VMTP |
Secure Versatile Message Transaction Protocol |
RFC 1045 |
| 83 |
VINES |
VINES |
|
| 84 |
TTP |
TTP |
|
| 85 |
NSFNET-IGP |
NSFNET-IGP |
|
| 86 |
DGP |
Dissimilar Gateway Protocol |
|
| 87 |
TCF |
TCF |
|
| 88 |
EIGRP |
EIGRP |
|
| 89 |
OSPF |
Open Shortest Path First |
RFC 1583 |
| 90 |
Sprite-RPC |
Sprite RPC Protocol |
|
| 91 |
LARP |
Locus Address Resolution Protocol |
|
| 92 |
MTP |
Multicast Transport Protocol |
|
| 93 |
AX.25 |
AX.25 |
|
| 94 |
IPIP |
IP-within-IP Encapsulation Protocol |
|
| 95 |
MICP |
Mobile Internetworking Control Protocol |
|
| 96 |
SCC-SP |
Semaphore Communications Sec. Pro |
|
| 97 |
ETHERIP |
Ethernet-within-IP Encapsulation |
RFC 3378 |
| 98 |
ENCAP |
Encapsulation Header |
RFC 1241 |
| 99 |
|
Any private encryption scheme |
|
| 100 |
GMTP |
GMTP |
|
| 101 |
IFMP |
Ipsilon Flow Management Protocol |
|
| 102 |
PNNI |
PNNI over IP |
|
| 103 |
PIM |
Protocol Independent Multicast |
|
| 104 |
ARIS |
ARIS |
|
| 105 |
SCPS |
SCPS |
|
| 106 |
QNX |
QNX |
|
| 107 |
A/N |
Active Networks |
|
| 108 |
IPComp |
IP Payload Compression Protocol |
RFC 3173 |
| 109 |
SNP |
Sitara Networks Protocol |
|
| 110 |
Compaq-Peer |
Compaq Peer Protocol |
|
| 111 |
IPX-in-IP |
IPX in IP |
|
| 112 |
VRRP |
Virtual Router Redundancy Protocol, Common Address Redundancy Protocol (not IANA assigned) |
VRRP:RFC 3768 |
| 113 |
PGM |
PGM Reliable Transport Protocol |
|
| 114 |
|
Any 0-hop protocol |
|
| 115 |
L2TP |
Layer Two Tunneling Protocol |
|
| 116 |
DDX |
D-II Data Exchange (DDX) |
|
| 117 |
IATP |
Interactive Agent Transfer Protocol |
|
| 118 |
STP |
Schedule Transfer Protocol |
|
| 119 |
SRP |
SpectraLink Radio Protocol |
|
| 120 |
UTI |
UTI |
|
| 121 |
SMP |
Simple Message Protocol |
|
| 122 |
SM |
SM |
|
| 123 |
PTP |
Performance Transparency Protocol |
|
| 124 |
|
IS-IS over IPv4 |
|
| 125 |
FIRE |
|
|
| 126 |
CRTP |
Combat Radio Transport Protocol |
|
| 127 |
CRUDP |
Combat Radio User Datagram |
|
| 128 |
SSCOPMCE |
|
|
| 129 |
IPLT |
|
|
| 130 |
SPS |
Secure Packet Shield |
|
| 131 |
PIPE |
Private IP Encapsulation within IP |
|
| 132 |
SCTP |
Stream Control Transmission Protocol |
|
| 133 |
FC |
Fibre Channel |
|
| 134 |
|
RSVP-E2E-IGNORE |
RFC 3175 |
| 135 |
|
Mobility Header |
RFC 3775 |
| 136 |
|
UDP Lite |
RFC 3828 |
| 137 |
|
MPLS-in-IP |
RFC 4023 |
| 138 |
manet |
MANET Protocols |
RFC-ietf-manet-iana-07.txt |
| 139 |
HIP |
Host Identity Protocol |
RFC-ietf-hip-base-10.txt |
| 140-252 |
UNASSIGNED |
| 253-254 |
Use for experimentation and testing |
RFC 3692 |
| 255 |
Reserved |
