    Network Working Group                                          J. Postel
    Request for Comments: 758                                        USC-ISI
    IEN: 117                                                     August 1979

    Obsoletes RFCs:  755,
    750,739, 604, 503, 433, 349
    Obsoletes IENs:  93

                                ASSIGNED NUMBERS

    This Network Working Group Request for Comments documents the currently
    assigned values from several series of numbers used in network protocol
    implementations.  This RFC will be updated periodically, and in any case
    current information can be obtained from Jon Postel. The assignment of
    numbers is also handled by Jon.  If you are developing a protocol or
    application that will require the use of a link, socket, etc. please
    contact Jon to receive a number assignment.

       Jon Postel
       USC - Information Sciences Institute
       4676 Admiralty Way
       Marina del Rey, California  90291

       phone: (213) 822-1511

       ARPANET mail: POSTEL@ISIB

    Most of the protocols mentioned here are documented in the RFC series of
    notes. The more prominent and more generally used are documented in the
    Protocol Handbook [1] prepared by the Network Information Center (NIC).
    In the lists that follow a bracketed number, e.g. [1], off to the right
    of the page indicates a reference for the listed protocol.

    Postel                                                          [Page 1]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Network Numbers

                            ASSIGNED NETWORK NUMBERS

       This list of network numbers is used in the internetwork, the field
       is 8 bits in size.

       Assigned Network Numbers

          Decimal   Octal  Name        Network                    References
          -------   -----  ----        -------                    ----------
                0       0              Reserved
                1       1  BBN-PR      BBN Packet Radio Network
                2       2  SF-PR-1     SF Bay Area Packet Radio Network (1)
                3       3  BBN-RCC     BBN RCC Network
                4       4  SATNET      Atlantic Satellite Network
                5       5  SILL-PR     Ft. Sill Packet Radio Network
                6       6  SF-PR-2     SF Bay Area Packet Radio Network (2)
                7       7  CHAOS       MIT CHAOS Network
                8      10  CLARKNET    SATNET subnet for Clarksburg
                9      11  BRAGG-PR    Ft. Bragg Packet Radio Network
               10      12  ARPANET     ARPANET                         [1,2]
               11      13  UCLNET      University College London Network
               12      14  CYCLADES    CYCLADES
               13      15  NPLNET      National Physical Laboratory
               14      16  TELENET     TELENET
               15      17  EPSS        British Post Office EPSS
               16      20  DATAPAC     DATAPAC
               17      21  TRANSPAC    TRANSPAC
               18      22  LCSNET      MIT LCS Network               [37,38]
               19      23  TYMNET      TYMNET
               20      24  DC-PR       Washington D.C. Packet Radio Network
               21      25  EDN         DCEC EDN
               22      26  DIALNET     DIALNET                       [47,48]
               23      27  MITRE       MITRE Cablenet                   [23]
               24      30  BBN-LOCAL   BBN Local Network
               25      31  RSRE-PPSN   RSRE / PPSN
               26      32  AUTODIN-II  AUTODIN II
               27      33  NOSC-LCCN   NOSC / LCCN
               28      34  WIDEBAND    Wide Band Satellite Network
               29      35  DCN-COMSAT  COMSAT Distributed Computing Network
               30      36  DCN-UCL     UCL Distributed Computing Network
               31      37  BBN-SAT-TEST  BBN SATNET Test Network
           32-254  40-376              Unassigned
              255     377              Reserved

    Postel                                                          [Page 2]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Internet Protocol Versions

                      ASSIGNED INTERNET PROTOCOL VERSIONS

       In the Internet Protocol (IP) there is a field to identify the
       version of the internetwork general protocol.  This field is 4 bits
       in size.

       Assigned Internet Protocol Versions

          Decimal   Octal      Version                            References
          -------   -----      -------                            ----------
              0      0         March 1977 version                       [35]
              1      1         January 1978 version                     [36]
              2      2         February 1978 version A                  [42]
              3      3         February 1978 version B                  [43]
              4      4         August 1979 version 4                    [44]
           5-14   5-16         Unassigned
             15     17         Reserved

    Postel                                                          [Page 3]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Internet Protocol Numbers

                       ASSIGNED INTERNET PROTOCOL NUMBERS

       In the Internet Protocol (IP) [44] there is a field to identify the
       the next level protocol.  This field is 8 bits in size.  This field
       is called Protocol in the IP header.

       Assigned Internet Protocol Numbers

          Decimal    Octal      Protocol Numbers                  References
          -------    -----      ----------------                  ----------
               0       0         Reserved
               1       1         raw internet datagrams                 [44]
               2       2         TCP-3                                  [36]
               3       3         Gateway-to-Gateway                     [49]
               4       4         Gateway Monitoring Message             [41]
               5       5         TCP-3.1                                [45]
               6       6         TCP-4                                  [46]
               7       7         UCL
               8      10         DSP                                 [37,38]
               9      11         Secure
              10      12         TCP-2                                  [35]
              11      13         NVP                                    [39]
              12      14         Unassigned
              13      15         Pluribus
              14      16         Telenet
              15      17         XNET
              16      20         Chaos
              17      21         User Datagram                          [50]
              18      22         Multiplexing                           [51]
           19-63   23-77         Unassigned
              64     100         EXPAK cumstats
              65     101         EXPAK PC messages
              66     102         Unassigned
              67     103         Gateway Monitoring
              68     104         Unassigned
              69     105         SIMP monitoring
              70     106         SIMP polling
              71     107         SIMP packet core/U
           72-76 110-114         Unassigned
              77     115         backroom SIMP polling
              78     116         backroom SIMP monitoring
              79     117         SIMP message generators
          80-254 120-376         Unassigned
             255     377         Reserved

    Postel                                                          [Page 4]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Port or Socket Numbers

                        ASSIGNED PORT or SOCKET NUMBERS

       Ports are used in the TCP [46] and sockets are used in the AHHP [1,3]
       to name the ends of logical connections which carry long term
       conversations.  For the purpose of providing services to unknown
       callers a service contact socket is defined.  This list specifies the
       port or socket used by the server process as its contact socket.  In
       the AHHP an Initial Connection Procedure ICP [1,34] is used between
       the user process and the server process to make the initial contact
       and establish the long term connections leaving the contact socket
       free to handle other callers.  In the TCP no ICP is necessary since a
       port may engage in many simultaneous connections.

       Socket Assignments:

          General Assignments:

             Decimal   Octal     Description
             -------   -----     -----------
             0-63      0-77      Network Wide Standard Function
             64-127    100-177   Hosts Specific Functions
             128-223   200-337   Reserved for Future Use
             224-255   340-377   Any Experimental Function

    Postel                                                          [Page 5]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Port or Socket Numbers

          Specific Assignments:

             Network Standard Functions

             Decimal   Octal     Description                      References
             -------   -----     -----------                      ----------
             1         1         Old Telnet                              [6]
             3         3         Old File Transfer                   [7,8,9]
             5         5         Remote Job Entry                     [1,10]
             7         7         Echo                                   [11]
             9         11        Discard                                [12]
             11        13        Who is on or SYSTAT
             13        15        Date and Time
             15        17        Who is up or NETSTAT
             17        21        Short Text Message
             19        23        Character generator or TTYTST          [13]
             21        25        New File Transfer                 [1,14,15]
             23        27        New Telnet                        [1,16,17]
             25        31        Distributed Programming System      [18,19]
             27        33        NSW User System w/COMPASS FE           [20]
             29        35        MSG-3 ICP                              [21]
             31        37        MSG-3 Authentication                   [21]
             33        41        DPS ICP                             [18,19]
             35        43        IO Station Spooler
             37        45        Time Server                          [1,22]
             39        47        NSW User System w/SRI FE               [20]
             41        51        Graphics                             [1,26]
             42        52        Name Server                            [52]
             43        53        WhoIs
             45        55        Internet Message Processing Module     [53]
             47-63     57-77     unassigned

    Postel                                                          [Page 6]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Port or Socket Numbers

             Host Specific Functions

             Decimal   Octal     Description                      References
             -------   -----     -----------                      ----------
             65        101       unassigned
             67        103       Datacomputer at CCA                    [24]
             69        105       CPYNET
             71        107       NETRJS (EBCDIC) at UCLA-CCN          [1,25]
             73        111       NETRJS (ASCII-68) at UCLA-CCN        [1,25]
             75        113       NETRJS (ASCII-63) at UCLA-CCN        [1,25]
             77        115       any private RJE server
             79        117       Name or Finger                       [1,40]
             81        121       Network BSYS
             83        123       MIT ML Device
             85        125       MIT ML Device
             86-94     126-136   unassigned
             95        137       SUPDUP                                 [33]
             97        141       Datacomputer Status
             98-127    142-136   unassigned

             Reserved for Future Use

             Decimal   Octal     Description                      References
             -------   -----     -----------                      ----------
             128-223   200-337   reserved

             Experimental Functions

             Decimal   Octal     Description                      References
             -------   -----     -----------                      ----------
             224-231   340-347   unassigned
             232-237   350-355   Authorized Mailer at BBN
             239       357       unassigned
             241       361       NCP Measurement                     [27,28]
             243       363       Survey Measurement               [28,29,30]
             245       365       LINK                                   [31]
             247       367       TIPSRV
             249-255   371-377   RSEXEC                              [31,32]

    Postel                                                          [Page 7]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    Link Numbers

                             ASSIGNED LINK NUMBERS

       The word "link" here refers to a field in the original ARPANET
       Host/IMP interface leader.  The link was originally defined as an 8
       bit field.  Some time after the ARPANET Host-to-Host (AHHP) protocol
       was defined and, by now, some time ago the definition of this field
       was changed to "Message-ID" and the length to 12 bits. The name link
       now refers to the high order 8 bits of this 12 bit message-id field.
       The low order 4 bits of the message-id field are to be zero unless
       specifically specified otherwise for the particular protocol used on
       that link.  The Host/IMP interface is defined in BBN report 1822 [2].

       Link Assignments:

          Decimal   Octal     Description                         References
          -------   -----     -----------                         ----------
          0         0         AHHP Control Messages                    [1,3]
          1         1         Reserved
          2-71      2-107     AHHP Regular Messages                    [1,3]
          72-151    110-227   Reserved
          152       230       PARC Universal Protocol
          153       231       TIP Status Reporting
          154       232       TIP Accounting
          155-158   233-236   Internet Protocol                         [44]
          159-191   237-277   Measurements                              [28]
          192-195   300-303   Message Switching Protocol               [4,5]
          196-255   304-377   Experimental Protocols
          224-255   340-377   NVP                                     [1,39]

    Postel                                                          [Page 8]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    References

                                   REFERENCES

       [1]    Feinler, E. and J. Postel, eds., "ARPANET Protocol Handbook,"
              NIC 7104, for the Defense Communications Agency by SRI
              International, Menlo Park, California, Revised January 1978.

       [2]    BBN, "Specifications for the Interconnection of a Host and an
              IMP," Report 1822, Bolt Beranek and Newman, Cambridge,
              Massachusetts, January 1976.

       [3]    McKenzie,A. "Host/Host Protocol for the ARPA Network,"
              NIC 8246, January 1972.  Also in [1].

       [4]    Walden, D. " A System for Interprocess Communication in a
              Resource Sharing Network," RFC 62, NIC 4962, 3 August 1970.
              Also published in Communications of the ACM, volume 15,
              number 4, April 1972.

       [5]    Bressler, B. "A Proposed Experiment with a Message Switching
              Protocol," RFC 333, NIC 9926, 15 May 72.

       [6]    Postel, J. "Telnet Protocol," RFC 318, NIC 9348, 3 April 1972.

       [7]    McKenzie, A. "File Transfer Protocol," RFC 454, NIC 14333,
              16 February 1973.

       [8]    Clements, R. "FTPSRV -- Extensions for Tenex Paged Files,"
              RFC 683, NIC 32251, 3 April 1975.  Also in [1].

       [9]    Harvey, B. "One More Try on the FTP," RFC 691, NIC 32700,
              6 June 1975.

       [10]   Bressler, B. "Remote Job Entry Protocol,"  RFC 407, NIC 12112,
              16 October 72.  Also in [1].

       [11]   Postel, J. "Echo Process,"  RFC 347, NIC 10426, 30 May 1972.

       [12]   Postel, J. "Discard Process,"  RFC 348, NIC 10427,
              30 May 1972.

       [13]   Postel, J. "Character Generator Process," RFC 429, NIC 13281,
              12 December 1972.

       [14]   Neigus, N. "File Transfer Protocol," RFC 542, NIC 17759,
              12 July 1973.  Also in [1].

    Postel                                                          [Page 9]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    References

       [15]   Postel, J. "Revised FTP Reply Codes," RFC 640, NIC 30843,
              5 June 1974.  Also in [1].

       [16]   McKenzie, A. "Telnet Protocol Specification," NIC 18639,
              August 1973.  Also in [1].

       [17]   McKenzie, A. "Telnet Option Specification," NIC 18640,
              August 1973.  Also in [1].

       [18]   White, J. "A High Level Framework for Network-Based Resource
              Sharing," RFC 707, NIC 34263, 14 January 1976. Also in NCC
              Proceedings, AFIPS, June 1976.

       [19]   White, J. "Elements of a Distributed Programming System,"
              RFC 708, NIC 34353, 28 January 1976.

       [20]   COMPASS. "Semi-Annual Technical Report," CADD-7603-0411,
              Massachusetts Computer Associates, 4 March 1976. Also as,
              "National Software Works, Status Report No. 1,"
              RADC-TR-76-276, Volume 1, September 1976. And COMPASS. "Second
              Semi-Annual Report," CADD-7608-1611, Massachusetts Computer
              Associates, 16 August 1976.

       [21]   NSW Protocol Committee, "MSG: The Interprocess Communication
              Facility for the National Software Works," CADD-7612-2411,
              Massachusetts Computer Associates, BBN 3237, Bolt Beranek and
              Newman, Revised 24 December 1976.

       [22]   Harrenstien, K. "Time Server," RFC 738, NIC 42218,
              31 October 1977.  Also in [1].

       [23]   Skelton, A., S. Holmgren, and D. Wood, "The MITRE Cablenet
              Project," IEN 96, April 1979.

       [24]   CCA, "Datacomputer Version 1 User Manual," Computer
              Corporation of America, August 1975.

       [25]   Braden, R. "NETRJS Protocol," RFC 740, NIC 42423,
              22 November 1977.  Also in [1].

       [26]   Sproull, R, and E. Thomas. "A Networks Graphics Protocol,"
              NIC 24308, 16 August 1974.  Also in [1].

       [27]   Cerf, V., "NCP Statistics," RFC 388, NIC 11360,
              23 August 1972.

    Postel                                                         [Page 10]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    References

       [28]   Cerf, V., "Formation of a Network Measurement Group (NMG),"
              RFC 323, NIC 9630, 23 March 1972.

       [29]   Bhushan, A., "A Report on the Survey Project," RFC 530,
              NIC 17375, 22 June 1973.

       [30]   Cantor, D., "Storing Network Survey Data at the Datacomputer,"
              RFC 565, NIC 18777, 28 August 1973.

       [31]   Bressler, R., "Inter-Entity Communication -- An Experiment,"
              RFC 441, NIC 13773, 19 January 1973.

       [32]   Thomas, R. "A Resource Sharing Executive for the ARPANET,"
              AFIPS Conference Proceedings, 42:155-163, NCC, 1973.

       [33]   Crispin, M. "SUPDUP Protocol," RFC 734, NIC 41953,
              7 October 1977.  Also in [1].

       [34]   Postel, J. "Official Initial Connection Protocol," NIC 7101,
              11 June 1971.  Also in [1].

       [35]   Cerf, V. "Specification of Internet Transmission Control
              Program -- TCP (version 2)," March 1977.

       [36]   Cerf, V. and J. Postel, "Specification of Internetwork
              Transmission Control Program -- TCP Version 3,"
              USC/Information Sciences Institute, January 1978.

       [37]   Reed, D. "Protocols for the LCS Network," Local Network Note
              3, Laboratory for Computer Science, MIT, 29 November 1976.

       [38]   Clark, D. "Revision of DSP Specification," Local Network Note
              9, Laboratory for Computer Science, MIT, 17 June 1977.

       [39]   Cohen, D. "Specifications for the Network Voice Protocol
              (NVP)," NSC Note 68, 29 January 1976.  Also as USC/Information
              Sciences Institute RR-75-39, March 1976, and as RFC 741,
              NIC 42444, 22 November 1977.  Also in [1].

       [40]   Harrenstien, K. "Name/Finger," RFC 742, NIC 42758,
              30 December 1977.  Also in [1].

       [41]   Cole, J. "Gateway Monitoring Messages," BBN, 1 February 1978.

       [42]   Postel, J. "Draft Internetwork Protocol Specification --
              Version 2," USC/Information Sciences Institute, February 1978.

    Postel                                                         [Page 11]

    RFC 758                                                      August 1979
    IEN 117                                                 Assigned Numbers
    References

       [43]   Cerf, V. "A Proposed New Internet Header Format," Advanced
              Research Projects Agency, IEN 26, 14 February 1978.

       [44]   Postel, J. "Internet Protocol," IEN-111, USC/Information
              Sciences Institute, August 1979.

       [45]   Cerf, V. "A Proposal for TCP Version 3.1 Header Format,"
              Advanced Research Projects Agency, IEN 26, 14 February 1978.

       [46]   Postel, J., "Transmission Control Protocol," IEN-112,
              USC/Information Sciences Institute, August 1979.

       [47]   McCarthy, J. and L. Earnest, "DIALNET," Stanford University
              Artificial Intelligence Laboratory, Undated.

       [48]   Crispin, M. and I. Zabala, "DIALNET Protocols," Stanford
              University Artificial Intelligence Laboratory, July 1978.

       [49]   Strazisar, V, and R. Perlman, "Gateway Routing, An
              Implementation Specification," IEN-30, Bolt Berenak and
              Newman, April 1978.

       [50]   Postel, J., "User Datagram Protocol," IEN-88, USC/Information
              Sciences Institute, May 1979.

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

       [52]   Postel, J., "Name Server," IEN-116, USC/Information Sciences
              Institute, August 1979.

       [53]   Postel, J., "Internet Message Protocol," RFC-759, IEN-113,
              USC/Information Sciences Institute, August 1979.

    Postel                                                         [Page 12]