The czar of socket numbers [Jon Postel] has established the following 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 all 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 - 239       Reserved for Future Use
       240 - 255       Any Experimental Function

Particular Assignments:

       Socket          Assignment
       
       1               Telnet
       3               File Transfer
       5               Remote Job Entry
       7               Echo
       9               Discard
       19              Character Generator [e.g. TTYTST]
       
       65              Speech Data Base @ ll-tx-2 (74)
       67              Datacomputer @ cca (31)
       
       241             NCP Measurement
       243             Survey Measurement
       245             LINK

The specifications for the assigned functions can be found in the

documents listed here:

               Telnet                  RFC 318
               File Transfer           RFC 354 & RFC 385
               Remote Job Entry        RFC 407
               Echo                    RFC 347
               Discard                 RFC 348
               Character Generator     RFC 429
               Speech Data Base        SUR 37
               Datacomputer            [Murray @ CCA]
               NCP Measurment          RFC 388
               Survey Data             [Kampe @ NMC]
               LINK                    [Bressler @ BBN]

It has come to our attention that there are several hosts performing useful public services on sockets which conflict with the above scheme. We hope we can resolve this problem 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 Neigus
Bolt Beranek and Newman
50 Moulton Street
Cambridge, Mass. 02139

Phone: (617) 661-0100

NIC Ident = NJN

We will be pleased to include socket/function information for

other than "offical" sockets [e.g Tip News].

   1   UCLA-NMC
      1   Telnet
      241 NCP Measurement
      243 Survey Data
   2    SRI-ARC
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   3    UCSB
      1    Telnet
      5    UCSB RJS [not ARPANET standard]
      7    Echo
      9    Discard
   4    UTAH
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   5    NCC
   6    MIT-Multics
      1    Telnet
   9   Harvard
      1    Telnet
      3    Sorry File Transfer
   10   LL-67
      1    Telnet
   11   SAIL
      1    Telnet
      3    File Transfer
   12   ILL-ANTS
   13   CASE
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   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
   31   CCA-TENEX
      1    Telnet
      3    File Transfer
      5    Echo
      9    SYSTAT
      11   NETSTAT
   35   UCSD
      1    Telnet
   65   UCLA-CCN
      1    Telnet
      7    Echo
      9    Discard
      11   NETPJS [EBCDIC]
      13   NETRJS [ASCII]
      15   NETRJS [TTY]
   66   SRI-AI
      1    Telnet
      3    DATE-TIME
      5    Echo
      7    CPYNET
      9    SYSTAT
      11   Sorry NETSTAT
   69   BBN-TENEX (a)
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
      15   NETSTAT
      17   Oneliners
      3604505 = x'370019' = o'15600031'   TIP News
   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
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
   133  BBN-TENEXB
      1    Telnet
      3    File Transfer
      5    Echo
      7    CPYNET
      9    SYSTAT
      13   DATE-TIME
      15   NETSTAT
      17   Oneliners
   134  MIT-AI
      1    Telnet
      3    File Transfer
   198  MIT-Mathlab
      1    Telnet
      3    File Transfer

Following hosts not tested

   7    RAND
   8    SDC-ADEPT
   19   NBS-ANTS
   138  LL-TSP

[ This RFC was put into machine readable form for entry ]

[ into the online RFC archives by James Carlson 11/98 ]