                                                                   Protocol Numbers

   Last Updated
           2009-06-18

   This registry is also available in XML and plain text formats.

   Registry included below

     * Assigned Internet Protocol Numbers

Assigned Internet Protocol Numbers

   Reference
           [RFC5237]

   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.

   Registration Procedures
           IESG Approval or Standards Action

   Decimal     Keyword                   Protocol                                                    Reference
      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                                   [Tony_Ballardie]
      8    EGP             Exterior Gateway Protocol             [RFC888][David_Mills]
      9    IGP             any private interior gateway (used by [Internet_Assigned_Numbers_Authority]
                           Cisco for their IGRP)
     10    BBN-RCC-MON     BBN RCC Monitoring                    [Steve_Chipman]
     11    NVP-II          Network Voice Protocol                [RFC741][Steve_Casner]
                                                                 [Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An Internetwork
     12    PUP             PUP                                   Architecture", XEROX Palo Alto Research Center, CSL-79-10, July 1979; also in IEEE
                                                                 Transactions on Communication, Volume COM-28, Number 4, April 1980.][[XEROX]]
     13    ARGUS           ARGUS                                 [Robert_W_Scheifler]
     14    EMCON           EMCON                                 [<mystery contact>]
     15    XNET            Cross Net Debugger                    [Haverty, J., "XNET Formats for Internet Protocol Version 4", IEN 158, October
                                                                 1980.][Jack_Haverty]
     16    CHAOS           Chaos                                 [J_Noel_Chiappa]
     17    UDP             User Datagram                         [RFC768][Jon_Postel]
     18    MUX             Multiplexing                          [Cohen, D. and J. Postel, "Multiplexing Protocol", IEN 90, USC/Information
                                                                 Sciences Institute, May 1979.][Jon_Postel]
     19    DCN-MEAS        DCN Measurement Subsystems            [David_Mills]
     20    HMP             Host Monitoring                       [RFC869][Robert_Hinden]
     21    PRM             Packet Radio Measurement              [Zaw_Sing_Su]
                                                                 ["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,
     22    XNS-IDP         XEROX NS IDP                          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.][[XEROX]]
     23    TRUNK-1         Trunk-1                               [Barry_Boehm]
     24    TRUNK-2         Trunk-2                               [Barry_Boehm]
     25    LEAF-1          Leaf-1                                [Barry_Boehm]
     26    LEAF-2          Leaf-2                                [Barry_Boehm]
     27    RDP             Reliable Data Protocol                [RFC908][Robert_Hinden]
     28    IRTP            Internet Reliable Transaction         [RFC938][Trudy_Miller]
     29    ISO-TP4         ISO Transport Protocol Class 4        [RFC905][<mystery contact>]
     30    NETBLT          Bulk Data Transfer Protocol           [RFC969][David_Clark]
                                                                 [Shuttleworth, B., "A Documentary of MFENet, a National Computer Network",
     31    MFE-NSP         MFE Network Services Protocol         UCRL-52317, Lawrence Livermore Labs, Livermore, California, June
                                                                 1977.][Barry_Howard]
     32    MERIT-INP       MERIT Internodal Protocol             [Hans_Werner_Braun]
     33    DCCP            Datagram Congestion Control Protocol  [RFC4340]
     34    3PC             Third Party Connect Protocol          [Stuart_A_Friedberg]
     35    IDPR            Inter-Domain Policy Routing Protocol  [Martha_Steenstrup]
     36    XTP             XTP                                   [Greg_Chesson]
     37    DDP             Datagram Delivery Protocol            [Wesley_Craig]
     38    IDPR-CMTP       IDPR Control Message Transport Proto  [Martha_Steenstrup]
     39    TP++            TP++ Transport Protocol               [Dirk_Fromhein]
     40    IL              IL Transport Protocol                 [Dave_Presotto]
     41    IPv6            Ipv6                                  [Steve_Deering]
     42    SDRP            Source Demand Routing Protocol        [Deborah_Estrin]
     43    IPv6-Route      Routing Header for IPv6               [Steve_Deering]
     44    IPv6-Frag       Fragment Header for IPv6              [Steve_Deering]
     45    IDRP            Inter-Domain Routing Protocol         [Sue_Hares]
     46    RSVP            Reservation Protocol                  [Bob_Braden]
     47    GRE             General Routing Encapsulation         [Tony_Li]
     48    DSR             Dynamic Source Routing Protocol       [RFC4728]
     49    BNA             BNA                                   [Gary Salamon]
     50    ESP             Encap Security Payload                [RFC2406]
     51    AH              Authentication Header                 [RFC4302]
     52    I-NLSP          Integrated Net Layer Security TUBA    [K_Robert_Glenn]
     53    SWIPE           IP with Encryption                    [John_Ioannidis]
     54    NARP            NBMA Address Resolution Protocol      [RFC1735]
     55    MOBILE          IP Mobility                           [Charlie_Perkins]
     56    TLSP            Transport Layer Security Protocol     [Christer_Oberg]
                           using Kryptonet key management
     57    SKIP            SKIP                                  [Tom_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            [Internet_Assigned_Numbers_Authority]
     62    CFTP            CFTP                                  [Forsdick, H., "CFTP", Network Message, Bolt Beranek and Newman, January
                                                                 1982.][Harry_Forsdick]
     63                    any local network                     [Internet_Assigned_Numbers_Authority]
     64    SAT-EXPAK       SATNET and Backroom EXPAK             [Steven_Blumenthal]
     65    KRYPTOLAN       Kryptolan                             [Paul Liu]
     66    RVD             MIT Remote Virtual Disk Protocol      [Michael_Greenwald]
     67    IPPC            Internet Pluribus Packet Core         [Steven_Blumenthal]
     68                    any distributed file system           [Internet_Assigned_Numbers_Authority]
     69    SAT-MON         SATNET Monitoring                     [Steven_Blumenthal]
     70    VISA            VISA Protocol                         [Gene_Tsudik]
     71    IPCV            Internet Packet Core Utility          [Steven_Blumenthal]
     72    CPNX            Computer Protocol Network Executive   [David Mittnacht]
     73    CPHB            Computer Protocol Heart Beat          [David Mittnacht]
     74    WSN             Wang Span Network                     [Victor Dafoulas]
     75    PVP             Packet Video Protocol                 [Steve_Casner]
     76    BR-SAT-MON      Backroom SATNET Monitoring            [Steven_Blumenthal]
     77    SUN-ND          SUN ND PROTOCOL-Temporary             [William_Melohn]
     78    WB-MON          WIDEBAND Monitoring                   [Steven_Blumenthal]
     79    WB-EXPAK        WIDEBAND EXPAK                        [Steven_Blumenthal]
     80    ISO-IP          ISO Internet Protocol                 [Marshall_T_Rose]
     81    VMTP            VMTP                                  [Dave_Cheriton]
     82    SECURE-VMTP     SECURE-VMTP                           [Dave_Cheriton]
     83    VINES           VINES                                 [Brian Horn]
     84    TTP             TTP                                   [Jim_Stevens]
     85    NSFNET-IGP      NSFNET-IGP                            [Hans_Werner_Braun]
     86    DGP             Dissimilar Gateway Protocol           [M/A-COM Government Systems, "Dissimilar Gateway Protocol Specification, Draft
                                                                 Version", Contract no. CS901145, November 16, 1987.][Mike_Little]
     87    TCF             TCF                                   [Guillermo_A_Loyola]
     88    EIGRP           EIGRP                                 [Cisco Systems, "Gateway Server Reference Manual", Manual Revision B, January 10,
                                                                 1988.][Guenther_Schreiner]
     89    OSPFIGP         OSPFIGP                               [RFC1583][John_Moy]
                                                                 [Welch, B., "The Sprite Remote Procedure Call System", Technical Report,
     90    Sprite-RPC      Sprite RPC Protocol                   UCB/Computer Science Dept., 86/302, University of California at Berkeley, June
                                                                 1986.][Bruce Willins]
     91    LARP            Locus Address Resolution Protocol     [Brian Horn]
     92    MTP             Multicast Transport Protocol          [Susie_Armstrong]
     93    AX.25           AX.25 Frames                          [Brian_Kantor]
     94    IPIP            IP-within-IP Encapsulation Protocol   [John_Ioannidis]
     95    MICP            Mobile Internetworking Control Pro.   [John_Ioannidis]
     96    SCC-SP          Semaphore Communications Sec. Pro.    [Howard_Hart]
     97    ETHERIP         Ethernet-within-IP Encapsulation      [RFC3378]
     98    ENCAP           Encapsulation Header                  [RFC1241][Robert_Woodburn]
     99                    any private encryption scheme         [Internet_Assigned_Numbers_Authority]
     100   GMTP            GMTP                                  [[RXB5]]
     101   IFMP            Ipsilon Flow Management Protocol      [Bob_Hinden][November 1995, 1997.]
     102   PNNI            PNNI over IP                          [Ross_Callon]
     103   PIM             Protocol Independent Multicast        [Dino_Farinacci]
     104   ARIS            ARIS                                  [Nancy_Feldman]
     105   SCPS            SCPS                                  [Robert_Durst]
     106   QNX             QNX                                   [Michael_Hunter]
     107   A/N             Active Networks                       [Bob_Braden]
     108   IPComp          IP Payload Compression Protocol       [RFC2393]
     109   SNP             Sitara Networks Protocol              [Manickam_R_Sridhar]
     110   Compaq-Peer     Compaq Peer Protocol                  [Victor_Volpe]
     111   IPX-in-IP       IPX in IP                             [CJ_Lee]
     112   VRRP            Virtual Router Redundancy Protocol    [RFC3768]
     113   PGM             PGM Reliable Transport Protocol       [Tony_Speakman]
     114                   any 0-hop protocol                    [Internet_Assigned_Numbers_Authority]
     115   L2TP            Layer Two Tunneling Protocol          [Bernard_Aboba]
     116   DDX             D-II Data Exchange (DDX)              [John_Worley]
     117   IATP            Interactive Agent Transfer Protocol   [John_Murphy]
     118   STP             Schedule Transfer Protocol            [Jean_Michel_Pittet]
     119   SRP             SpectraLink Radio Protocol            [Mark_Hamilton]
     120   UTI             UTI                                   [Peter_Lothberg]
     121   SMP             Simple Message Protocol               [Leif_Ekblad]
     122   SM              SM                                    [Jon_Crowcroft]
     123   PTP             Performance Transparency Protocol     [Michael_Welzl]
     124   ISIS over IPv4                                        [Tony_Przygienda]
     125   FIRE                                                  [Criag_Partridge]
     126   CRTP            Combat Radio Transport Protocol       [Robert_Sautter]
     127   CRUDP           Combat Radio User Datagram            [Robert_Sautter]
     128   SSCOPMCE                                              [Kurt_Waber]
     129   IPLT                                                  [[Hollbach]]
     130   SPS             Secure Packet Shield                  [Bill_McIntosh]
     131   PIPE            Private IP Encapsulation within IP    [Bernhard_Petri]
     132   SCTP            Stream Control Transmission Protocol  [Randall_R_Stewart]
     133   FC              Fibre Channel                         [Murali_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]
     139   HIP             Host Identity Protocol                [RFC5201]
     140   Shim6           Shim6 Protocol                        [RFC5533]
   141-252                 Unassigned                            [Internet_Assigned_Numbers_Authority]
     253                   Use for experimentation and testing   [RFC3692]
     254                   Use for experimentation and testing   [RFC3692]
     255   Reserved                                              [Internet_Assigned_Numbers_Authority]

                                                                        People

                    ID                                  Name                                   Contact URI                   Last Updated
   [Barry_Boehm]                         Barry Boehm                         mailto:boehm&arpa.mil
   [Barry_Howard]                        Barry Howard                        mailto:Howard&nmfecc.llnl.gov
   [Bernard_Aboba]                       Bernard Aboba                       mailto:bernarda&microsoft.com                   1998-04
   [Bernhard_Petri]                      Bernhard Petri                      mailto:bernhard.petri&nsn.com                   2000-03
   [Bill_McIntosh]                       Bill McIntosh                       mailto:BMcIntosh&fortresstech.com
   [Bob_Braden]                          Bob Braden                          mailto:braden&isi.edu                           1997-07
   [Bob_Hinden]                          Bob Hinden                          mailto:hinden&ipsilon.com
   [Brian_Kantor]                        Brian Kantor                        mailto:brian&ucsd.edu
   [CJ_Lee]                              CJ Lee                              mailto:cj_lee&novell.com                        1997-10
   [Charlie_Perkins]                     Charlie Perkins                     mailto:perk&watson.ibm.com                      1994-10
   [Christer_Oberg]                      Christer Oberg                      mailto:chg&bull.se                              1994-10
   [Criag_Partridge]                     Criag Partridge                     mailto:craig&bbn.com                            1999-08
   [Dave_Cheriton]                       Dave Cheriton                       mailto:cheriton&pescadero.stanford.edu
   [Dave_Presotto]                       Dave Presotto                       mailto:presotto&plan9.att.com                   1995-07
   [David_Clark]                         David Clark                         mailto:ddc&lcs.mit.edu
   [David_Mills]                         David Mills                         mailto:Mills&huey.udel.edu
   [Deborah_Estrin]                      Deborah Estrin                      mailto:estrin&usc.edu
   [Dino_Farinacci]                      Dino Farinacci                      mailto:dino&cisco.com                           1996-03
   [Dirk_Fromhein]                       Dirk Fromhein                       mailto:df&watershed.com
   [Gene_Tsudik]                         Gene Tsudik                         mailto:tsudik&usc.edu
   [Greg_Chesson]                        Greg Chesson                        mailto:Greg&sgi.com
   [Guenther_Schreiner]                  Guenther Schreiner                  mailto:snmp-admin&ira.uka.de
   [Guillermo_A_Loyola]                  Guillermo A. Loyola                 mailto:LOYOLA&ibm.com
   [Hans_Werner_Braun]                   Hans-Werner Braun                   mailto:HWB&mcr.umich.edu
   [Harry_Forsdick]                      Harry Forsdick                      mailto:Forsdick&bbn.com
   [Howard_Hart]                         Howard Hart                         mailto:hch&hybrid.com
   [Internet_Assigned_Numbers_Authority] Internet Assigned Numbers Authority mailto:iana&iana.org                            1995-06
   [J_Noel_Chiappa]                      J. Noel Chiappa                     mailto:JNC&xx.lcs.mit.edu
   [Jack_Haverty]                        Jack Haverty                        mailto:jhaverty&oracle.com
   [Jean_Michel_Pittet]                  Jean-Michel Pittet                  mailto:jmp&gandalf.engr.sgi.com                 1998-11
   [Jim_Stevens]                         Jim Stevens                         mailto:Stevens&isi.edu
   [John_Ioannidis]                      John Ioannidis                      mailto:ji&cs.columbia.edu
   [John_Moy]                            John Moy                            mailto:jmoy&proteon.com
   [John_Murphy]                         John Murphy                         mailto:john.m.murphy&mci.com                    1998-10
   [John_Worley]                         John Worley                         mailto:worley&milehigh.net                      1998-06
   [Jon_Crowcroft]                       Jon Crowcroft                       mailto:jon&cs.ucl.ac.uk                         1999-06
   [Jon_Postel]                          Jon Postel                          mailto:postel&isi.edu
   [K_Robert_Glenn]                      K. Robert Glenn                     mailto:glenn&osi.ncsl.nist.gov
   [Kurt_Waber]                          Kurt Waber                          mailto:kurt.waber&swisscom.com                  1999-08
   [Leif_Ekblad]                         Leif Ekblad                         mailto:leif.ekblad&eslov.mail.telia.com         1999-03
   [Manickam_R_Sridhar]                  Manickam R. Sridhar                 mailto:msridhar&sitaranetworks.com              1997-09
   [Mark_Hamilton]                       Mark Hamilton                       mailto:mah&spectralink.com                      1998-11
   [Marshall_T_Rose]                     Marshall T. Rose                    mailto:mrose&dbc.mtview.ca.us
   [Martha_Steenstrup]                   Martha Steenstrup                   mailto:MSteenst&bbn.com
   [Michael_Greenwald]                   Michael Greenwald                   mailto:Greenwald&scrc-stony-brook.symbolics.com
   [Michael_Hunter]                      Michael Hunter                      mailto:mphunter&qnx.com                         1997-07
   [Michael_Welzl]                       Michael Welzl                       mailto:michael&tk.uni-linz.ac.at                1999-08
   [Mike_Little]                         Mike Little                         mailto:little&macom4.arpa
   [Murali_Rajagopal]                    Murali Rajagopal                    mailto:murali&gadzoox.com                       2000-05
   [Nancy_Feldman]                       Nancy Feldman                       mailto:nkf&vnet.ibm.com                         1997-01
   [Peter_Lothberg]                      Peter Lothberg                      mailto:roll&stupi.se                            1999-03
   [Randall_R_Stewart]                   Randall R. Stewart                  mailto:rrs&cisco.com                            2000-04
   [Robert_Durst]                        Robert Durst                        mailto:durst&mitre.org                          1997-03
   [Robert_Hinden]                       Robert Hinden                       mailto:Hinden&eng.sun.com
   [Robert_Sautter]                      Robert Sautter                      mailto:rsautter&acdnj.itt.com                   1999-08
   [Robert_W_Scheifler]                  Robert W. Scheifler                 mailto:RWS&xx.lcs.mit.edu
   [Robert_Woodburn]                     Robert Woodburn                     mailto:woody&cseic.saic.com
   [Ross_Callon]                         Ross Callon                         mailto:rcallon&baynetworks.com                  1995-12
   [Steve_Casner]                        Steve Casner                        mailto:casner&isi.edu
   [Steve_Chipman]                       Steve Chipman                       mailto:Chipman&f.bbn.com
   [Steve_Deering]                       Steve Deering                       mailto:deering&parc.xerox.com                   1995-03
   [Steven_Blumenthal]                   Steven Blumenthal                   mailto:BLUMENTHAL&vax.bbn.com
   [Stuart_A_Friedberg]                  Stuart A. Friedberg                 mailto:stuart&cs.wisc.edu
   [Sue_Hares]                           Sue Hares                           mailto:skh&merit.edu
   [Susie_Armstrong]                     Susie Armstrong                     mailto:Armstrong.wbst128&xerox.com
   [Tom_Markson]                         Tom Markson                         mailto:markson&osmosys.ingog.com                1995-09
   [Tony_Ballardie]                      Tony Ballardie                      mailto:A.Ballardie&cs.ucl.ac.uk
   [Tony_Li]                             Tony Li                             mailto:tli&cisco.com
   [Tony_Przygienda]                     Tony Przygienda                     mailto:prz&siara.com                            1999-08
   [Tony_Speakman]                       Tony Speakman                       mailto:speakman&cisco.com                       1998-01
   [Trudy_Miller]                        Trudy Miller                        mailto:Trudy&acc.com
   [Victor_Volpe]                        Victor Volpe                        mailto:vvolpe&smtp.microcom.com                 1997-10
   [Wesley_Craig]                        Wesley Craig                        mailto:Wesley.Craig&terminator.cc.umich.edu
   [William_Melohn]                      William Melohn                      mailto:Melohn&sun.com
   [Zaw_Sing_Su]                         Zaw-Sing Su                         mailto:ZSu&tsca.istc.sri.
