| icmp 1 ICMP # Internet Control Message |
| igmp 2 IGMP # Internet Group Management |
| ggp 3 GGP # Gateway-to-Gateway |
| ip 4 IP # IP in IP (encasulation) |
| st 5 ST # Stream |
| tcp 6 TCP # Transmission Control |
| ucl 7 UCL # UCL |
| egp 8 EGP # Exterior Gateway Protocol |
| igp 9 IGP # any private interior gateway |
| bbn-rcc-mon 10 BBN-RCC-MON # BBN RCC Monitoring |
| nvp-ii 11 NVP-II # Network Voice Protocol |
| pup 12 PUP # PUP |
| argus 13 ARGUS # ARGUS |
| emcon 14 EMCON # EMCON |
| xnet 15 XNET # Cross Net Debugger |
| chaos 16 CHAOS # Chaos |
| udp 17 UDP # User Datagram |
| mux 18 MUX # Multiplexing |
| dcn-meas 19 DCN-MEAS # DCN Measurement Subsystems |
| hmp 20 HMP # Host Monitoring |
| prm 21 PRM # Packet Radio Measurement |
| xns-idp 22 XNS-IDP # XEROX NS IDP |
| trunk-1 23 TRUNK-1 # Trunk-1 |
| trunk-2 24 TRUNK-2 # Trunk-2 |
| leaf-1 25 LEAF-1 # Leaf-1 |
| leaf-2 26 LEAF-2 # Leaf-2 |
| rdp 27 RDP # Reliable Data Protocol |
| irtp 28 IRTP # Internet Reliable Transaction |
| iso-tp4 29 ISO-TP4 # ISO Transport Protocol Class 4 |
| netblt 30 NETBLT # Bulk Data Transfer Protocol |
| mfe-nsp 31 MFE-NSP # MFE Network Services Protocol |
| merit-inp 32 MERIT-INP # MERIT Internodal Protocol |
| sep 33 SEP # Sequential Exchange Protocol |
| 3pc 34 3PC # Third Party Connect Protocol |
| idpr 35 IDPR # Inter-Domain Policy Routing Protocol |
| xtp 36 XTP # XTP |
| ddp 37 DDP # Datagram Delivery Protocol |
| idpr-cmtp 38 IDPR-CMTP # IDPR Control Message Transport Proto |
| tp++ 39 TP++ # TP++ Transport Protocol |
| il 40 IL # IL Transport Protocol |
| ipv6 41 IPv6 # Internet Protocol, version 6 |
| sip 41 SIP # Simple Internet Protocol |
| sdrp 42 SDRP # Source Demand Routing Protocol |
| ipv6-route 43 IPv6-Route # Routing Header for IPv6 |
| sip-sr 43 SIP-SR # SIP Source Route |
| ipv6-frag 44 IPv6-Frag # Fragment Hedaer for IPv6 |
| sip-frag 44 SIP-FRAG # SIP Fragment |
| idrp 45 IDRP # Inter-Domain Routing Protocol |
| rsvp 46 RSVP # Reservation Protocol |
| gre 47 GRE # General Routing Encapsulation |
| mhrp 48 MHRP # Mobile Host Routing Protocol |
| bna 49 BNA # BNA |
| esp 50 esp # Encap Security Payload |
| ah 51 AH # Authentication Header |
| i-nlsp 52 I-NLSP # Integrated Net Layer Security TUBA |
| swipe 53 SWIPE # IP with Encryption |
| nhrp 54 NHRP # NBMA Next Hop Resolution Protocol |
| mobile 55 MOBILE # IP Mobility (IP tunneling) |
| ipv6-icmp 58 icmpv6 IPv6-ICMP ICMPv6 # ICMP version 6 |
| ipv6-nonxt 59 IPv6-Nonxt # No Next Header for IPv6 |
| ipv6-opts 60 IPv6-Opts # Destination Options for IPv6 |
| any 61 any # host internal protocol |
| cftp 62 CFTP # CFTP |
| any 63 any # local network |
| sat-expak 64 SAT-EXPAK # SATNET and Backroom EXPAK |
| kryptolan 65 KRYPTOLAN # Kryptolan |
| rvd 66 RVD # MIT Remote Virtual Disk Protocol |
| ippc 67 IPPC # Internet Pluribus Packet Core |
| any 68 any # distributed file system |
| sat-mon 69 SAT-MON # SATNET Monitoring |
| visa 70 VISA # VISA Protocol |
| ipcv 71 IPCV # Internet Packet Core Utility |
| cpnx 72 CPNX # Computer Protocol Network Executive |
| cphb 73 CPHB # Computer Protocol Heart Beat |
| wsn 74 WSN # Wang Span Network |
| pvp 75 PVP # Packet Video Protocol |
| br-sat-mon 76 BR-SAT-MON # Backroom SATNET Monitoring |
| sun-nd 77 SUN-ND # SUN ND PROTOCOL-Temporary |
| wb-mon 78 WB-MON # WIDEBAND Monitoring |
| wb-expak 79 WB-EXPAK # WIDEBAND EXPAK |
| iso-ip 80 ISO-IP # ISO Internet Protocol |
| vmtp 81 VMTP # VMTP |
| secure-vmtp 82 SECURE-VMTP # SECURE-VMTP |
| vines 83 VINES # VINES |
| ttp 84 TTP # TTP |
| nsfnet-igp 85 NSFNET-IGP # NSFNET-IGP |
| dgp 86 DGP # Dissimilar Gateway Protocol |
| tcf 87 TCF # TCF |
| igrp 88 IGRP # IGRP |
| ospfigp 89 OSPFIGP # OSPFIGP |
| sprite-rpc 90 Sprite-RPC # Sprite RPC Protocol |
| larp 91 LARP # Locus Address Resolution Protocol |
| mtp 92 MTP # Multicast Transport Protocol |
| ax.25 93 AX.25 # AX.25 Frames |
| ipip 94 IPIP # IP-within-IP Encapsulation Protocol |
| micp 95 MICP # Mobile Internetworking Control Pro. |
| scc-sp 96 SCC-SP # Semaphore Communications Sec. Pro. |
| etherip 97 ETHERIP # Ethernet-within-IP Encapsulation |
| encap 98 ENCAP # Encapsulation Header |
| any 99 any # private encryption scheme |
| gmtp 100 GMTP # GMTP |
| pim 103 PIM # Protocol Independant Multicast |
| ipcomp 108 IPCOMP # IP Payload Compression Protocol |
| reserved 255 Reserved # |