Network Working Group                                          N. Neigus
Request for Comments: 503                                      J. Postel
NIC: 15747                                                 13 April 1973
References: 349, 433


                           Socket Number List
	
   This is a second pass at the specification of the socket numbers.
   More sockets have been made available for experimental functions,
   some new sockets have been assigned for network standard functions,
   host specific functions and experimental functions, and the list of
   available sockets for server hosts has been updated.

   Following are the current assignments for socket numbers used for
   public functions.  Note that a socket number is a 40 bit quantity,
   the first 8 bits being the host specification, the next 24 bits being
   site specific, and the last 8 bits being user specified -- these last
   8 bits are called the AEN [it stands for, cleverly enough, Another
   Eightbit Number].

   For the assignments here the value in the host field ranges across al
   hosts (unless otherwise specified), the value in the 24 bit field is
   zero, and the AEN is indicated here.

General Assignments:

   Sockets             Assignment

   0 - 63              Network Wide Standard Functions
   64 - 127            Host Specific Functions
   128 - 223           Reserved for Future Use
   224 - 255           Any Experimental Function

Particular Assignments:

   Socket              Assignment

     1                 Telnet
     3                 File Transfer
     5                 Remote Job Entry
     7                 Echo
     9                 Discard
    11                 Systat or who-is-on function
    13                 Date-Time function
    15                 Netstat or who-is-up function
    19                 Character Generator [e.g. TTYTST]

    65                 Speech Data Base @ 11-tx-2 (74)
    67
    69                 CPYNET
    71                 NETRJS [EBCDIC]
    73                 NETRJS [ASCII]
    75                 NETRJS [TTY]

   241                 NCP Measurement
   243                 Survey Measurement
   245                 LINK
   247                 RSEXEC
   249                 RSEXEC
   251                 RSEXEC

   The specifications for the assigned functions can be found in the
   documents listed here:

   Telnet                   NIC 7104
   File Transfer            NIC 7104
   Remote Job Entry         NIC 7104
   Echo                     RFC 347
   Discard                  RFC 348
   Character Generator      RFC 429
   Speech Data Base         SUR 37
   Datacomputer             [Murray @ CCA]
   NCP Measurement          RFC 388
   Survey Data              [Kampa @ NMC]
   LINK                     [Bressler @ BBN]
   RSEXEC                   [Thomas @ BBN]

   There are several hosts performing public services on sockets which
   conflict with the above scheme.  We hope we can resolve these
   conflicts with a minimum of disruption.

   The following is a tabulation of socket numbers together with the
   services offered.  This listing is presented as an aid to network
   users.  If you know of a socket function which has been left out or
   an entry which should be corrected or deleted please contact:

   Jon Postel
   3804 Boelter Hall
   Computer Science Department
   University of California
   Los Angeles, CA. 90024

   Phone: (213) 825-2368

   NIC Ident - JBP

         or

   Nancy J. Neigus
   Bolt Beranek and Newman
   50 Moulton Street
   Cambridge, Mass. 02138

   Phone: (617) 661-0100

   NIC Ident = NJN

   We will be pleased to include socket/function information for other
   than "official" sockets [e.g. Tip News].

   1   UCLA-NMC

       1      Telnet
       3      File Transfer
       241    NCP Measurement
       243    Survey Data

   2   SRI-ARC

       1      Telnet
       3      File Transfer
       7      Echo
       11     SYSTAT
       13     DATE-TIME
       69     CPYNET

   3   UCSB

       1      Telnet
       5      UCSB RJS [not ARPANET standard]
       7      Echo
       9      Discard

       1793, 1795, 1797, 1799, 1801, 2049 Graphics terminal sockets
       x'701', '703', '705', '707', '709', '801' o'3401', '3403',
       '3405', '3407', '3411', '4001'

       4   UTAH

           1      Telnet
           3      File Transfer
           5      Echo
           7      CPYNET
           9      SYSTAT
           13     DATE-TIME

       6   MIT-Multics

           1      Telnet
           3      File Transfer

       8   SDC-Adept

           1      Telnet

       9   Harvard

           1      Telnet
           3      File Transfer

       10  LL-67

           1      Telnet

       11  SAIL

           1      Telnet
           3      File Transfer

       13  CASE

           1      Telnet
           3      File Transfer
           7      Echo
           11     SYSTAT
           13     DATE-TIME
           69     CPYNET

       14  CMU

           1      Telnet
           3      File Transfer

       15  ILLIAC-TENEX

           1      Telnet
           3      File Transfer
           5      Echo
           7      CPYNET
           9      SYSTAT
           13     DATE-TIME

       16  NASA-AMES

           1      Telnet
           3      File Transfer
           5      Sorry Remote Job Entry
           7      Echo
           9      Discard
           241    NCP Measurement

       23  USC-44

           1      Telnet

       31  CCA-TENEX
           1      Telnet
           3      File Transfer
           7      Echo
           11     SYSTAT
           15     NETSTAT

       35  UCSD

           1      Telnet

       65  UCLA-CCN

           1      Telnet
           3      File Transfer
           7      Echo
           9      Discard
           71     NETRJS [EBCDIC]
           73     NETRJS [ASCII]
           75     NETRJS [TTY]

       66  SRI-AI

           1      Telnet
           3      File Transfer
           5      Echo
           7      CPYNET
           9      SYSTAT
           11     Sorry NETSAT

       69  BBN-TENEX (a)

           1      Telnet
           3      File Transfer
           7      Echo
           11     SYSTAT
           13     DATE-TIME
           15     NETSTAT
           17     Oneliners
           69     CPYNET
           247 = x'F7' = o'367' TIP RSEXEC Facility

       70  MIT-DMCG

           1      Telnet
           3      File Transfer
           7      Network Status
           9      Discard

       74  LL-TX-2

           1      Telnet

       78  CMU-alt

           1      Telnet
           3      File Transfer

       86  ISI-TENEX

           1      Telnet
           3      File Transfer
           7      Echo
           11     SYSTAT
           13     DATE-TIME
           69     CPYNET

       133 BBN-TENEXB

           1      Telnet
           3      File Transfer
           7      Echo
           11     SYSTAT
           13     DATE-TIME
           15     NETSTAT
           17     Oneliners
           69     CPYNET

       134 MIT-AI

           1      Telnet
           3      File Transfer

       198 MIT-Mathlab

           1      Telnet
           3      File Transfer

       User only hosts -- no server sockets

           5      NCC
           7      RAND
           12     ILI-ANTS
           19     NBS-ANTS
           32     PARC-MAXC (currently)
           138    LL-TSP
           197    BBN-1D