

Network Working Group                                          J. Postel
Request for Comments: 770                                            ISI
                                                          September 1980

Obsoletes RFCs:  762, 758, 755,
750, 739, 604, 503, 433, 349
Obsoletes IENs:  127, 117, 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@ISIF

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 770                                                   September 1980
                                                        Assigned Numbers
Network Numbers



                        ASSIGNED NETWORK NUMBERS

   This list of network numbers is used in the internet, 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      40  UCL-CR1     UCL Cambridge Ring 1
           33      41  UCL-CR2     UCL Cambridge Ring 2
           34      42  MATNET      Mobile Access Terminal Network
           35      43  NULL        UCL/RSRE Null Network
           36      44  SU-NET      Stanford University Ethernet



Postel                                                          [Page 2]


RFC 770                                                   September 1980
                                                        Assigned Numbers
Network Numbers



           37      45  DECNET      Digital Equipment Network
           38      46  DECNET-TEST  Test Digital Equipment Network
       39-254  47-376              Unassigned
          255     377              Reserved













































Postel                                                          [Page 3]


RFC 770                                                   September 1980
                                                        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]
        1-3    1-3         Unassigned
          4      4         January 1980 version                     [44]
          5      5         ST Datagram Mode                         [45]
       6-14   6-16         Unassigned
         15     17         Reserved

































Postel                                                          [Page 4]


RFC 770                                                   September 1980
                                                        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         ST                                     [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         PUP                                    [55]
          13      15         Pluribus
          14      16         Telenet
          15      17         XNET
          16      20         Chaos
          17      21         User Datagram                          [50]
          18      22         Multiplexing                           [51]
          19      23         DCN
       20-62   24-76         Unassigned
          63      77         any local network
          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 5]


RFC 770                                                   September 1980
                                                        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.

   The assigned ports/sockets use a small part of the possible
   port/socket numbers.  The ports/assigned sockets have all except the
   low order eight bits cleared to zero.  The low order eigth bits are
   specified here.

   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 6]


RFC 770                                                   September 1980
                                                        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        57        NI FTP                                 [54]
         49        61        RAND Network Graphics Conference       [56]
         51        63        Simple Internet Mail
         53        65        AUTODIN II FTP                         [57]
         55        67        ISI Graphics Language                  [58]
         57        71        Mail Transfer                          [43]
         59-63     73-77     unassigned












Postel                                                          [Page 7]


RFC 770                                                   September 1980
                                                        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
         69        105       Trivial File Transfer                  [42]
         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
         87        127       any terminal link
         89        131       SU/MIT Telnet Gateway
         91-94     133-136   unassigned
         95        137       SUPDUP                                 [33]
         97        141       Datacomputer Status
         99        143       CADC - NIFTP via UCL
         101       145       NPL - NIFTP via UCL
         103       147       BNPL - NIFTP via UCL
         105       151       CAMBRIDGE - NIFTP via UCL
         107       153       HARWELL - NIFTP via UCL
         109       155       SWURCC - NIFTP via UCL
         111       157       ESSEX - NIFTP via UCL
         113       161       RUTHERFORD - NIFTP via UCL
         115-127   163-177   unassigned

         Reserved for Future Use

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













Postel                                                          [Page 8]


RFC 770                                                   September 1980
                                                        Assigned Numbers
Port or Socket Numbers



         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 9]


RFC 770                                                   September 1980
                                                        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]
      72-150    110-226   Reserved
      151       227       CHAOS Protocol
      152       230       PARC Universal Protocol
      153       231       TIP Status Reporting
      154       232       TIP Accounting
      155       233       Internet Protocol (regular traffic)       [44]
      156-158   234-236   Internet Protocol (experimental traffic)  [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]
      248-255   370-377   Network Maintenance


















Postel                                                         [Page 10]


RFC 770                                                   September 1980
                                                        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, May 1978.

   [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 11]


RFC 770                                                   September 1980
                                                        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 5/4 User Manual," Computer
          Corporation of America, August 1979.

   [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 12]


RFC 770                                                   September 1980
                                                        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]   Sollins, K. "The TFTP Protocol," IEN 133, MIT/LCS,
          January 1980.



Postel                                                         [Page 13]


RFC 770                                                   September 1980
                                                        Assigned Numbers
References



   [43]   Sluizer, S., and J. Postel, "Mail Transfer Protocol," RFC 772,
          USC/Information Sciences Institute, September 1980.

   [44]   Postel, J. "DOD Standard Internet Protocol," IEN 128, RFC 760,
          USC/Information Sciences Institute, January 1980.

   [45]   Forgie, J. "ST - A Proposed Internet Stream Protocol,"
          IEN 119, M.I.T. Lincoln Laboratory, September 1979.

   [46]   Postel, J., "DOD Standard Transmission Control Protocol,"
          IEN 129, RFC 761, USC/Information Sciences Institute,
          January 1980.

   [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., "How to Build a Gateway," IEN 109, Bolt Berenak
          and Newman, August 1979.

   [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 1980.

   [54]   The High Level Protocol Group, "A Network Independent File
          Transfer Protocol,"  INWG Protocol Note 86, December 1977.

   [55]   Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An
          Internetwork Architecture," XEROX Palo Alto Research Center,
          CSL-79-10, July 1979.

   [56]   O'Brien, M., "A Network Graphical Conferencing System," RAND
          Corporation, N-1250-ARPA, August 1979.

   [57]   Forsdick, H., and A. McKenzie, "FTP Functional Specification,"
          Bolt Beranek and Newman, Report 4051, August 1979.



Postel                                                         [Page 14]


RFC 770                                                   September 1980
                                                        Assigned Numbers
References



   [58]   Bisbey, R., D. Hollingworth, B. Britt, and G. Mellstrom,
          "Graphics Language (version 2)," USC/Information Sciences
          Institute, June 1979.

   












































Postel                                                         [Page 15]
