Protocol Numbers

(last updated 2008-04-18)

Registries included below:
- Assigned Internet Protocol Numbers


Registry Name: Assigned Internet Protocol Numbers
Reference: [RFC5237]
Registration Procedures: IESG Approval or Standards Action
Note: In the Internet Protocol version 4 (IPv4) [RFC791] there is a field
called "Protocol" to identify the next level protocol.  This is an 8
bit field.  In Internet Protocol version 6 (IPv6) [RFC1883], this field
is called the "Next Header" field.

Registry:
Decimal  Keyword          Protocol                                 References
-------  ---------------  ---------------------------------------  ------------------
0        HOPOPT           IPv6 Hop-by-Hop Option                   [RFC1883]
1        ICMP             Internet Control Message                 [RFC792] 
2        IGMP             Internet Group Management                [RFC1112]
3        GGP              Gateway-to-Gateway                       [RFC823]
4        IP               IP in IP (encapsulation)                 [RFC2003]
5        ST               Stream                                   [RFC1190][RFC1819]
6        TCP              Transmission Control                     [RFC793]
7        CBT              CBT                                      [Ballardie]
8        EGP              Exterior Gateway Protocol                [RFC888][DLM1]
9        IGP              any private interior gateway             [IANA]
                          (used by Cisco for their IGRP)  
10       BBN-RCC-MON      BBN RCC Monitoring                       [SGC]
11       NVP-II           Network Voice Protocol                   [RFC741][SC3]
12       PUP              PUP                                      [PUP][XEROX]
13       ARGUS            ARGUS                                    [RWS4]
14       EMCON            EMCON                                    [BN7]
15       XNET             Cross Net Debugger                       [IEN158][JFH2]
16       CHAOS            Chaos                                    [NC3]
17       UDP              User Datagram                            [RFC768][JBP]
18       MUX              Multiplexing                             [IEN90][JBP]
19       DCN-MEAS         DCN Measurement Subsystems               [DLM1]
20       HMP              Host Monitoring                          [RFC869][RH6]
21       PRM              Packet Radio Measurement                 [ZSU]
22       XNS-IDP          XEROX NS IDP                             [ETHERNET][XEROX]
23       TRUNK-1          Trunk-1                                  [BWB6]
24       TRUNK-2          Trunk-2                                  [BWB6]
25       LEAF-1           Leaf-1                                   [BWB6]
26       LEAF-2           Leaf-2                                   [BWB6]
27       RDP              Reliable Data Protocol                   [RFC908][RH6]
28       IRTP             Internet Reliable Transaction            [RFC938][TXM]
29       ISO-TP4          ISO Transport Protocol Class 4           [RFC905][RC77]
30       NETBLT           Bulk Data Transfer Protocol              [RFC969][DDC1]
31       MFE-NSP          MFE Network Services Protocol            [MFENET][BCH2]
32       MERIT-INP        MERIT Internodal Protocol                [HWB]
33       DCCP             Datagram Congestion Control Protocol     [RFC4340]
34       3PC              Third Party Connect Protocol             [SAF3]
35       IDPR             Inter-Domain Policy Routing Protocol     [MXS1] 
36       XTP              XTP                                      [GXC]
37       DDP              Datagram Delivery Protocol               [WXC]
38       IDPR-CMTP        IDPR Control Message Transport Proto     [MXS1]
39       TP++             TP++ Transport Protocol                  [DXF]
40       IL               IL Transport Protocol                    [Presotto]
41       IPv6             Ipv6                                     [Deering]    
42       SDRP             Source Demand Routing Protocol           [DXE1]
43       IPv6-Route       Routing Header for IPv6                  [Deering]
44       IPv6-Frag        Fragment Header for IPv6                 [Deering]
45       IDRP             Inter-Domain Routing Protocol            [Hares]
46       RSVP             Reservation Protocol                     [Braden]
47       GRE              General Routing Encapsulation            [Li]
48       DSR              Dynamic Source Routing Protocol          [RFC4728]
49       BNA              BNA                                      [Salamon]
50       ESP              Encap Security Payload                   [RFC2406]
51       AH               Authentication Header                    [RFC2402]
52       I-NLSP           Integrated Net Layer Security  TUBA      [GLENN]
53       SWIPE            IP with Encryption                       [JI6]
54       NARP             NBMA Address Resolution Protocol         [RFC1735]
55       MOBILE           IP Mobility                              [Perkins]
56       TLSP             Transport Layer Security Protocol        [Oberg]
                          using Kryptonet key management
57       SKIP             SKIP                                     [Markson]
58       IPv6-ICMP        ICMP for IPv6                            [RFC1883]
59       IPv6-NoNxt       No Next Header for IPv6                  [RFC1883]
60       IPv6-Opts        Destination Options for IPv6             [RFC1883]
61                        any host internal protocol               [IANA]
62       CFTP             CFTP                                     [CFTP][HCF2]
63                        any local network                        [IANA]
64       SAT-EXPAK        SATNET and Backroom EXPAK                [SHB]
65       KRYPTOLAN        Kryptolan                                [PXL1]
66       RVD              MIT Remote Virtual Disk Protocol         [MBG]
67       IPPC             Internet Pluribus Packet Core            [SHB]
68                        any distributed file system              [IANA]
69       SAT-MON          SATNET Monitoring                        [SHB]
70       VISA             VISA Protocol                            [GXT1]
71       IPCV             Internet Packet Core Utility             [SHB]
72       CPNX             Computer Protocol Network Executive      [DXM2]
73       CPHB             Computer Protocol Heart Beat             [DXM2]
74       WSN              Wang Span Network                        [VXD]
75       PVP              Packet Video Protocol                    [SC3]
76       BR-SAT-MON       Backroom SATNET Monitoring               [SHB]
77       SUN-ND           SUN ND PROTOCOL-Temporary                [WM3]
78       WB-MON           WIDEBAND Monitoring                      [SHB]
79       WB-EXPAK         WIDEBAND EXPAK                           [SHB]
80       ISO-IP           ISO Internet Protocol                    [MTR]
81       VMTP             VMTP                                     [DRC3]
82       SECURE-VMTP      SECURE-VMTP                              [DRC3]
83       VINES            VINES                                    [BXH]
84       TTP              TTP                                      [JXS]
85       NSFNET-IGP       NSFNET-IGP                               [HWB]
86       DGP              Dissimilar Gateway Protocol              [DGP][ML109]
87       TCF              TCF                                      [GAL5]
88       EIGRP            EIGRP                                    [CISCO][GXS]
89       OSPFIGP          OSPFIGP                                  [RFC1583][JTM4]
90       Sprite-RPC       Sprite RPC Protocol                      [SPRITE][BXW] 
91       LARP             Locus Address Resolution Protocol        [BXH]
92       MTP              Multicast Transport Protocol             [SXA]
93       AX.25            AX.25 Frames                             [BK29]         
94       IPIP             IP-within-IP Encapsulation Protocol      [JI6]
95       MICP             Mobile Internetworking Control Pro.      [JI6]
96       SCC-SP           Semaphore Communications Sec. Pro.       [HXH]     
97       ETHERIP          Ethernet-within-IP Encapsulation         [RFC3378]
98       ENCAP            Encapsulation Header                     [RFC1241,RXB3]
99                        any private encryption scheme            [IANA]
100      GMTP             GMTP                                     [RXB5]
101      IFMP             Ipsilon Flow Management Protocol         [Hinden]
102      PNNI             PNNI over IP                             [Callon]
103      PIM              Protocol Independent Multicast           [Farinacci]
104      ARIS             ARIS                                     [Feldman]
105      SCPS             SCPS                                     [Durst]
106      QNX              QNX                                      [Hunter]
107      A/N              Active Networks                          [Braden]
108      IPComp           IP Payload Compression Protocol          [RFC2393]
109      SNP              Sitara Networks Protocol                 [Sridhar]
110      Compaq-Peer      Compaq Peer Protocol                     [Volpe]
111      IPX-in-IP        IPX in IP                                [Lee]
112      VRRP             Virtual Router Redundancy Protocol       [RFC3768]
113      PGM              PGM Reliable Transport Protocol          [Speakman]
114                       any 0-hop protocol                       [IANA]
115      L2TP             Layer Two Tunneling Protocol             [Aboba]
116      DDX              D-II Data Exchange (DDX)                 [Worley] 
117      IATP             Interactive Agent Transfer Protocol      [Murphy]
118      STP              Schedule Transfer Protocol               [JMP]
119      SRP              SpectraLink Radio Protocol               [Hamilton]
120      UTI              UTI                                      [Lothberg]
121      SMP              Simple Message Protocol                  [Ekblad]
122      SM               SM                                       [Crowcroft]
123      PTP              Performance Transparency Protocol        [Welzl]
124      ISIS over IPv4                                            [Przygienda]
125      FIRE                                                      [Partridge]
126      CRTP             Combat Radio Transport Protocol          [Sautter]
127      CRUDP            Combat Radio User Datagram               [Sautter]
128      SSCOPMCE                                                  [Waber]
129      IPLT                                                      [Hollbach]
130      SPS              Secure Packet Shield                     [McIntosh] 
131      PIPE             Private IP Encapsulation within IP       [Petri]
132      SCTP             Stream Control Transmission Protocol     [Stewart]
133      FC               Fibre Channel                            [Rajagopal]
134      RSVP-E2E-IGNORE                                           [RFC3175]
135      Mobility Header                                           [RFC3775]
136      UDPLite                                                   [RFC3828]
137      MPLS-in-IP                                                [RFC4023]
138      manet            MANET Protocols                          [RFC-ietf-manet-iana-07.txt]
139      HIP              Host Identity Protocol                   [RFC5201]     
140-252                   Unassigned                               [IANA]
253                       Use for experimentation and testing      [RFC3692] 
254                       Use for experimentation and testing      [RFC3692] 
255      Reserved                                                  [IANA]


References
----------
[CFTP]      Forsdick, H., "CFTP", Network Message, Bolt Beranek and
            Newman, January 1982.

[CISCO]     Cisco Systems, "Gateway Server Reference Manual", Manual
            Revision B, January 10, 1988.

[DDN]       Feinler, E., Editor, "DDN Protocol Handbook", Network
            Information Center, SRI International, December 1985.

[DGP]       M/A-COM Government Systems, "Dissimilar Gateway Protocol
            Specification, Draft Version", Contract no. CS901145,
            November 16, 1987.

[ETHERNET]  "The Ethernet, A Local Area Network: Data Link Layer and
            Physical Layer Specification", AA-K759B-TK, Digital
            Equipment Corporation, Maynard, MA.  Also as: "The
            Ethernet - A Local Area Network", Version 1.0, Digital
            Equipment Corporation, Intel Corporation, Xerox
            Corporation, September 1980.  And: "The Ethernet, A Local
            Area Network: Data Link Layer and Physical Layer
            Specifications", Digital, Intel and Xerox, November 1982.
            And: XEROX, "The Ethernet, A Local Area Network: Data Link
            Layer and Physical Layer Specification", X3T51/80-50,
            Xerox Corporation, Stamford, CT., October 1980.

[IEN90]    Cohen, D. and J. Postel, "Multiplexing Protocol", IEN 90,
           USC/Information Sciences Institute, May 1979.

[IEN119]   Forgie, J., "ST - A Proposed Internet Stream Protocol",
           IEN 119, MIT Lincoln Laboratory, September 1979.

[IEN158]   Haverty, J., "XNET Formats for Internet Protocol Version 4",
           IEN 158, October 1980.

[MFENET]   Shuttleworth, B., "A Documentary of MFENet, a National
           Computer Network", UCRL-52317, Lawrence Livermore Labs,
           Livermore, California, June 1977.

[PUP]      Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An
           Internetwork Architecture", XEROX Palo Alto Research Center,
           CSL-79-10, July 1979; also in IEEE Transactions on
           Communication, Volume COM-28, Number 4, April 1980.

[SPRITE]   Welch, B., "The Sprite Remote Procedure Call System",
           Technical Report, UCB/Computer Science Dept., 86/302,
           University of California at Berkeley, June 1986.

[RFC741]   Cohen, D., "Specifications for the Network Voice Protocol",
           RFC 741, ISI/RR 7539, USC/Information Sciences Institute,
           March 1976.

[RFC768]   Postel, J., "User Datagram Protocol", STD 6, RFC 768,
           USC/Information Sciences Institute, August 1980.

[RFC791]   Postel, J., "Internet Protocol - DARPA Internet Prnogram
           Protocol Specification", STD 5, RFC 791, DARPA, September
           1981.

[RFC792]   Postel, J., "Internet Control Message Protocol - DARPA
           Internet Program Protocol Specification", STD 5, RFC 792,
           USC/Information Sciences Institute, September 1981.

[RFC793]   Postel, J., "Transmission Control Protocol - DARPA
           Internet Program Protocol Specification", STD 7, RFC 793,
           USC/Information Sciences Institute, September 1981.

[RFC823]   Hinden, R., and A. Sheltzer, "The DARPA Internet Gateway",
           RFC 823, BBN, September 1982.

[RFC869]   Hinden, R., "A Host Monitoring Protocol", RFC 869,
           Bolt Beranek and Newman, December 1983.

[RFC888]   Seamonson, L., and E. Rosen, "STUB" Exterior Gateway
           Protocol", RFC 888, BBN Communications Corporation,
           January 1984.

[RFC905]   International Standards Organization, "ISO Transport Protocol
           Specification - ISO DP 8073", RFC 905, April 1984.

[RFC908]   Velten, D., R. Hinden, and J. Sax, "Reliable Data Protocol",
           RFC 908, BBN Communications Corporation, July 1984.

[RFC938]   Miller, T., "Internet Reliable Transaction Protocol", RFC 938,
           ACC, February 1985.

[RFC969]   Clark, D., M. Lambert, and L. Zhang, "NETBLT: A Bulk Data
           Transfer Protocol", RFC 969, MIT Laboratory for Computer
           Science, December 1985.

[RFC1112]  Deering, S., "Host Extensions for IP Multicasting",
           STD 5, RFC 1112, Stanford University, August 1989.

[RFC1190]  Topolcic, C., Editor, "Experimental Internet Stream
           Protocol, Version 2 (ST-II)", RFC 1190, CIP Working Group,
           October 1990.

[RFC1241]  Woodburn, W., and D. Mills, " A Scheme for an Internet
           Encapsulation Protocol: Version 1", RFC 1241, SAIC,
           University of Delaware, July 1991.

[RFC1583]  Moy, J., "The OSPF Specification", RFC 1583, Proteon,
           March 1994.

[RFC1735]  Heinanen, J., and R. Govindan, " NBMA Address Resolution
           Protocol (NARP)", RFC 1735, Telecom Finland and USC/ISI,
           December 1994.

[RFC1819]  L. Delgrossi, L. Berger, and ST2 Working Group, "Internet
           Stream Protocol Version 2 (ST2) Protocol Specification 
           - Version ST2+", RFC 1819, August 1995.

[RFC1883]  Deering, S., and R. Hinden, "Internet Protocol, Version 6
           (IPv6) Specification", RFC 1883, Xerox PARC, Ipsilon
           Networks, December 1995.

[RFC2003]  Perkins, C., "IP Encapsulation within IP", RFC 2003, IBM,
           September 1996.

[RFC2393]  Shacham, A., and R. Monsour, R. Pereira, M. Thomas, "IP
           Payload Compression Protocol (IPComp)", RFC 2393, Cisco,
           Hi/fn, TimeStep, AltaVista Internt, December 1998.

[RFC2402]  S. Kent and R. Atkinson, "IP Authentication Header", 
           RFC 2402, November 1998.

[RFC2406]  S. Kent and R. Atkinson, "IP Encapsulating Security Payload (ESP)",
           RFC 2406, November 1998.

[RFC3175]  F. Baker, C. Iturralde, F. Le Faucheur, B. Davie,
           "Aggregation of RSVP for IPv4 and IPv6 Reservations", 
           RFC 3175, September 2001.

[RFC3378]  R. Housley and S. Hollenbeck, "EtherIP: Tunneling Ethernet 
           Frames in IP Datagrams", RFC 3378, September 2002.

[RFC3692]  T. Narten, "Assigning Experimental and Testing Numbers Considered 
           Useful", RFC 3692, January 2004.

[RFC3768]  R. Hinden, Ed., "Virtual Router Redundancy Protocol (VRRP)",
           RFC 3768, April 2004.

[RFC3775]   D. Johnson, C. Perkins, and J. Arkko, "Mobility Support in IPv6",
            RFC 3775, June 2004.

[RFC3828]  L-A. Larzon, M. Degermark, S. Pink, L-E. Jonsson Ed., and 
           G. Fairhurst, Ed., "The UDP-Lite Protocol", RFC 3828, July 2004.

[RFC4023]  T. Worster, Y. Rekhter, and E. Rosen, Ed., "Encapsulating MPLS in 
           IP or Generic Routing Encapsulation (GRE)", RFC 4023, March 2005.

[RFC4340]  E. Kohler, M. Handley and S. Floyd, "Datagram Congestion 
           Control Protocol (DCCP)", RFC 4340, March 2006.

[RFC4728]  D.B. Johnson, D.A. Maltz and Y-C. Hu, "The Dynamic Source Routing Protocol
           for Mobile Ad Hoc Networks (DSR)", RFC 4728, February 2007.

[RFC-ietf-manet-iana-07.txt]
           I. Chakeres, "IANA Allocations for MANET Protocols", RFC XXXX, 
           Month Year.

[RFC5201]  R. Moskowitz, P. Nikander, P. Jokela, Ed., T. Henderson, "Host Identity 
           Protocol", RFC 5201, April 2008.

[RFC5237]  J. Arkko, S. Bradner, "IANA Allocation Guidelines for the Protocol Field", 
           RFC 5237, February 2008.

People
------
[Aboba] Bernard Aboba <bernarda&microsoft.com>, April 1998.

[Ballardie] Tony Ballardie <A.Ballardie&cs.ucl.ac.uk>

[BCH2] Barry Howard  <Howard&NMFECC.LLNL.GOV>

[BK29] Brian Kantor  <brian&UCSD.EDU>

[BN7] <mystery contact> 

[Braden] Bob Braden, <braden&isi.edu>, July 1997.

[BWB6] Barry Boehm  <boehm&ARPA.MIL>

[BXH] Brian Horn 

[BXW] Bruce Willins 

[Callon] Ross Callon, <rcallon&baynetworks.com>, December 1995.

[Carpenter] Brian Carpenter, <brian&dxcoms.cern.ch>, January 1995.

[Crowcroft] Jon Crowcroft <jon&cs.ucl.ac.uk>, June 1999.

[DDC1] David Clark  <ddc&LCS.MIT.EDU>

[Deering] Steve Deering, <deering&parc.xerox.com>, March 1995.

[DLM1] David Mills  <Mills&HUEY.UDEL.EDU>

[Doraswamy] Naganand Doraswamy, <naganand&BayNetworks.com>, September 1997.

[DRC3] Dave Cheriton  <cheriton&PESCADERO.STANFORD.EDU>

[Durst] Robert Durst, <durst&mitre.org>, March 1997.

[DXE1] Deborah Estrin  <estrin&usc.edu>

[DXF] Dirk Fromhein  <df&watershed.com>

[DXM2] David Mittnacht 

[Ekblad] Leif Ekblad <leif.ekblad&eslov.mail.telia.com>, March 1999.

[Farinacci] Dino Farinacci, <dino&cisco.com>, March 1996.

[Feldman] Nancy Feldman <nkf&vnet.ibm.com> January 1997.

[GAL5] Guillermo A. Loyola  <LOYOLA&IBM.COM>

[GLENN]  K. Robert Glenn  <glenn&osi.ncsl.nist.gov>

[GXC] Greg Chesson  <Greg&SGI.COM>

[GXS] Guenther Schreiner  <snmp-admin&ira.uka.de>

[GXT1] Gene Tsudik  <tsudik&USC.EDU>

[Hamilton] Mark Hamilton <mah&spectralink.com>, November 1998.

[Hares]  Sue Hares <skh&merit.edu>

[HCF2] Harry Forsdick  <Forsdick&BBN.COM>

[Hinden] Bob Hinden, <hinden&ipsilon.com>, November 1995, 1997.

[Hunter] Michael Hunter, <mphunter&qnx.com>, July 1997.

[HWB] Hans-Werner Braun  <HWB&MCR.UMICH.EDU>

[HXH] Howard Hart  <hch&hybrid.com>

[IANA] Internet Assigned Numbers Authority, <iana&iana.org>, June 1995.

[JBP] Jon Postel <postel&isi.edu>

[JMP] Jean-Michel Pittet, <jmp&gandalf.engr.sgi.com>, November 1998.

[JC120] <mystery contact>

[JFH2] Jack Haverty <jhaverty&ORACLE.COM>

[JI6] John Ioannidis  <ji&CS.COLUMBIA.EDU>

[JTM4] John Moy  <jmoy&PROTEON.COM>

[JWF] Jim Forgie  <FORGIE&XN.LL.MIT.EDU>

[JXS] Jim Stevens  <Stevens&ISI.EDU>

[KATZ]  Dave Katz <dkatz&cisco.com>

[Lee] CJ Lee, <cj_lee&novell.com>, October 1997.

[Li] Tony Li  <tli&cisco.com>

[Lothberg] Peter Lothberg <roll&stupi.se>, March 1999.

[Markson] Tom Markson, <markson&osmosys.ingog.com>, September 1995.

[MB] Mike Brescia  <Brescia&CCV.BBN.COM>

[MBG] Michael Greenwald  <Greenwald&SCRC-STONY-BROOK.SYMBOLICS.COM>

[McIntosh] Bill McIntosh <BMcIntosh&fortresstech.com>

[ML109] Mike Little  <little&MACOM4.ARPA>

[MTR] Marshall T. Rose  <mrose&dbc.mtview.ca.us>

[Murphy] John Murphy <john.m.murphy&mci.com>, October 1998.

[MXS1] Martha Steenstrup  <MSteenst&BBN.COM>

[NC3] J. Noel Chiappa  <JNC&XX.LCS.MIT.EDU>

[Oberg] Christer Oberg <chg&bull.se> October 1994.

[Partridge] Criag Partridge <craig&bbn.com>, August 1999.

[Perkins] Charlie Perkins <perk&watson.ibm.com>, October 1994.

[Petri] Bernhard Petri <bernhard.petri&nsn.com>, March 2000.

[Presotto] Dave Presotto  <presotto&plan9.att.com>, July 1995.

[Przygienda] Tony Przygienda <prz&siara.com>, August 1999.

[PXL1] Paul Liu  

[Rajagopal] Murali Rajagopal, <murali&gadzoox.com>, May 2000.

[RH6] Robert Hinden  <Hinden&ENG.SUN.COM>

[RTB3] Bob Braden <braden&isi.edu>

[RC77] <mystery contact>

[RDH1] Russ Housley  <rhousley&rsasecurity.com>

[RWS4] Robert W. Scheifler  <RWS&XX.LCS.MIT.EDU>

[RXB3] Robert Woodburn <woody&cseic.saic.com>

[Sautter] Robert Sautter <rsautter&acdnj.itt.com>, August 1999.

[SAF3] Stuart A. Friedberg  <stuart&CS.WISC.EDU>

[Salamon] Gary Salamon 

[SC3] Steve Casner  <casner&isi.edu>

[SGC] Steve Chipman  Chipman&F.BBN.COM>

[SHB] Steven Blumenthal  <BLUMENTHAL&VAX.BBN.COM>

[Speakman] Tony Speakman <speakman&cisco.com>, January 1998.

[Sridhar] Manickam R.Sridhar <msridhar&sitaranetworks.com>, September 1997.

[Stewart] Randall R. Stewart <rrs&cisco.com>, April 2000. 

[SXA] Susie Armstrong  <Armstrong.wbst128&XEROX.COM>

[SXD] Steve Deering  <deering&PARC.XEROX.COM>

[TXM] Trudy Miller  <Trudy&ACC.COM>

[Volpe] Victor Volpe <vvolpe&smtp.microcom.com>, October 1997.

[VXD] Victor Dafoulas  

[Waber] Kurt Waber <kurt.waber&swisscom.com>, August 1999.

[Welzl] Michael Welzl  <michael&tk.uni-linz.ac.at>, August 1999.

[WM3] William Melohn  <Melohn&SUN.COM>

[WXC] Wesley Craig   <Wesley.Craig&terminator.cc.umich.edu>

[Worley] John Worley <worley&milehigh.net>, June 1998.

[ZSU] Zaw-Sing Su  <ZSu&TSCA.ISTC.SRI.>

[]