Protocol Numbers

0 HOPOPT IPv6 Hop-by-Hop Option

1 ICMP Internet Control Message

2 IGMP Internet Group Management

3 GGP Gateway-to-Gateway

4 IP IP in IP (encapsulation)

5 ST Stream

6 TCP Transmission Control

7 CBT CBT

8 EGP Exterior Gateway Protocol

9 IGP any private interior gateway (used by Cisco for their IGRP)

10 BBN-RCC-MON BBN RCC Monitoring

11 NVP-II Network Voice Protocol

12 PUP PUP

13 ARGUS ARGUS

14 EMCON EMCON

15 XNET Cross Net Debugger

16 CHAOS Chaos

17 UDP User Datagram

18 MUX Multiplexing

19 DCN-MEAS DCN Measurement Subsystems

20 HMP Host Monitoring

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 Data Protocol

28 IRTP Internet Reliable Transaction

29 ISO-TP4 ISO Transport Protocol Class 4

30 NETBLT Bulk Data Transfer Protocol

31 MFE-NSP MFE Network Services Protocol

32 MERIT-INP MERIT Internodal Protocol

33 SEP Sequential Exchange Protocol

34 3PC Third Party Connect Protocol

35 IDPR Inter-Domain Policy Routing Protocol

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 Reservation Protocol

47 GRE General Routing Encapsulation

48 MHRP Mobile Host Routing Protocol

49 BNA BNA

50 ESP Encapsulating Security Payload

51 AH Authentication Header

52 I-NLSP Integrated Net Layer Security TUBA

53 SWIPE IP with Encryption

54 NARP NBMA Address Resolution Protocol

55 MOBILE IP Mobility

56 TLSP Transport Layer Security Protocol using Kryptonet key management

57 SKIP SKIP

58 IPv6-ICMP ICMP for IPv6

59 IPv6-NoNxt No Next Header for IPv6

60 IPv6-Opts Destination Options for IPv6

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 ISO Internet Protocol

81 VMTP VMTP

82 SECURE-VMTP SECURE-VMTP

83 VINES VINES

84 TTP TTP

85 NSFNET-IGP NSFNET-IGP

86 DGP Dissimilar Gateway Protocol

87 TCF TCF

88 EIGRP EIGRP

89 OSPFIGP OSPFIGP

90 Sprite-RPC Sprite RPC Protocol

91 LARP Locus Address Resolution Protocol

92 MTP Multicast Transport Protocol

93 AX.25 AX.25 Frames

94 IPIP IP-within-IP Encapsulation Protocol

95 MICP Mobile Internetworking Control Protocol

96 SCC-SP Semaphore Communications Sec. Protocol

97 ETHERIP Ethernet-within-IP Encapsulation

98 ENCAP Encapsulation Header

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

109 SNP Sitara Networks Protocol

110 Compaq-Peer Compaq Peer Protocol

111 IPX-in-IP IPX in IP

112 VRRP Virtual Router Redundancy Protocol

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 ISIS 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

135-254 Unassigned

255 Reserved