    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers

    Network Working Group                                          J. Postel
    Request for Comments: 739                                        USC-ISI
    NIC: 42341                                              11 November 1977

                                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 to the protocol assigned that number.

                                                                    [Page 1]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned 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                      [35,36]
          159-191   237-277   Measurements                              [28]
          192-195   300-303   Message Switching Protocol               [4,5]
          196-255   304-377   Experimental Protocols

                                                                    [Page 2]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned Socket Numbers

                            ASSIGNED SOCKET NUMBERS

       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 all callers an Initial Connection Procedure ICP
       [1,34] is used between the user process and the server process.  This
       list specifies the socket used by the server process as its contact
       socket.

       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

                                                                    [Page 3]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned Socket Numbers

          Specific Assignments:

             Decimal   Octal     Description                      References
             -------   -----     -----------                      ----------
             Network Standard Functions
             1         1         Old Telnet                              [6]
             3         3         Old File Transfer                   [7,8,9]
             5         5         Remote Job Entry                       [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                            [22]
             39        47        NSW User System w/SRI FE               [20]
             Host Specific Functions
             65        101       Speech Data Base at LL-TX-2            [23]
             67        103       Datacomputer at CCA                    [24]
             69        105       CPYNET
             71        107       NETRJS (EBCDIC) at UCLA-CCN            [25]
             73        111       NETRJS (ASCII) at UCLA-CCN             [25]
             75        113       NETRJS (TTY) at UCLA-CCN               [25]
             77        115       any private RJE server
             79        117       Finger
             81        121       Network BSYS
             95        137       SUPDUP                                 [33]
             Experimental Functions
             229       345       Garlick's Debugger
             232-237   350-355   Authorized Mailer at BBN
             239       357       Graphics                             [1,26]
             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]

                                                                    [Page 4]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned Network Numbers

                            ASSIGNED NETWORK NUMBERS

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

       Assigned Network Numbers

          Decimal   Octal      Network
          -------   -----      -------
                0       0      Reserved
                1       1      BBN Packet Radio Network
                2       2      SF Bay Area Packet Radio Network (1)
                3       3      BBN RCC Network
                4       4      Atlantic Satellite Network
                5       5      Washington D.C. Packet Radio Network
                6       6      SF Bay Area Packet Radio Network (2)
              7-9    7-11      Not assigned
               10      12      ARPANET
               11      13      University College London Network
               12      14      CYCLADES
               13      15      National Physical Laboratory
               14      16      TELENET
               15      17      British Post Office EPSS
               16      20      DATAPAC
               17      21      TRANSPAC
               18      22      LCS Network
               19      23      TYMNET
           20-254  24-376      Unassigned
              255     377      Reserved

                                                                    [Page 5]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned Internet Message Versions

                       ASSIGNED INTERNET MESSAGE VERSIONS

       In the internetwork protocols there is a field to identify the
       version of the internetwork general protocol.  This field is 4 bits
       in size.

       Assigned Internet Message Versions

          Decimal   Octal      Version                            References
          -------   -----      -------                            ----------
              0      0         Old                                      [35]
              1      1         Current                                  [36]
           2-14   2-16         Unassigned
             15     17         Reserved

                                                                    [Page 6]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned Internet Message Formats

                       ASSIGNED INTERNET MESSAGE FORMATS

       In the internetwork protocols there is a field to identify the format
       of the host level specific protocol.  This field is 8 bits in size.

       Assigned Internet Message Formats

          Decimal   Octal      Format                             References
          -------   -----      ------                             ----------
              0      0         Reserved
              1      1         raw internet
              2      2         TCP-3                                    [36]
              3      3         DSP                                   [37,38]
          2-254  2-376         Unassigned
            255    377         Reserved

                                                                    [Page 7]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    Assigned Internet Message Types

                        ASSIGNED INTERNET MESSAGE TYPES

       In the internetwork old protocol there is a field to identify the
       type of the message.  This field is 4 bits in size.

       Assigned Internet Message Types

          Decimal   Octal      Type
          -------   -----      ----
              0      0         Escape
              1      1         TCP-2
              2      2         Secure
              3      3         Gateway
              4      4         Measurement
              5      5         DSP
              6      6         UCL
           7-12   7-14         Reserved
             13     15         Pluribus
             14     16         Telenet
             15     17         Xnet

                                                                    [Page 8]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    References

                                   REFERENCES

       [1]    Feinler, E. "ARPANET Protocol Handbook," NIC 7104, Defense
              Communications Agency, 1 April 1976.

       [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.

       [4]    Walden, D. "A System for Interrprocess Communication in a
              Resource Sharing Computer Network," RFC 62, NIC 4962,
              3-Aug-70. 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-72.

       [7]    McKenzie, A. "File Transfer Protocol," NIC 14333, RFC 454,
              16-Feb-73.

       [8]    Clements, R. "FTPSRV -- Extensions for Tenex Paged Files," RFC
              683, NIC 32251, 3-April-75.

       [9]    Harvey, B. "One More Try on the FTP," RFC 691, NIC 32700,
              6-Jun-75.

       [10]   Bressler, B. "Remote Job Entry Protocol,"  RFC 407, NIC 12112,
              16-Oct-72.

       [11]   Postel, J. "Echo Process,"  RFC 347, NIC 10426, 30-May-72.

       [12]   Postel, J. "Discard Process,"  RFC 348, NIC 10427, 30-May-72.

       [13]   Postel, J. "Character Generator Process," RFC 429, NIC 13281,
              12-Dec-72.

       [14]   Neigus, N. "File Transfer Protocol," NIC 17759 RFC 542
              12-July-73.

       [15]   Postel, J. "Revised FTP Reply Codes," NIC 30843 RFC 640
              5-June-74.

                                                                    [Page 9]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    References

       [16]   McKenzie, A. "Telnet Protocol Specifications," NIC 18639,
              August 1973.

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

       [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-Oct-77.

       [23]   Armenti, A., D. Hall, and A. Stone. "Lincoln Speech Data
              Facility," SUR Note 37, NIC 10917, 14 July 1972.

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

       [25]   Braden, R. "Interim NETRJS Specification," RFC 189, NIC 7133,
              15-July-71.

       [26]   Sproull, R, and E. Thomas. "A Networks Graphics Protocol," NIC
              24308, 16-Aug-74.

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

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

                                                                   [Page 10]

    NWG/RFC# 739                                         JBP 11 Nov 77 42341
    Assigned Numbers
    References

       [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.

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

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

       [36]   Cerf, V. and J. Postel, "Specification of Internet
              Transmission Control Program -- TCP-3," November 1977.

       [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.

                                                                   [Page 11]