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Socket number list
RFC 433

Document type: RFC - Unknown (December 1972)
Obsoleted by RFC 503
Obsoletes RFC 349
Document stream: Legacy
Last updated: 2013-03-02
Other versions: plain text, pdf, html

Legacy State: (None)
Document shepherd: No shepherd assigned

IESG State: RFC 433 (Unknown)
Responsible AD: (None)
Send notices to: No addresses provided

Network Working Group                              Jon Postel (UCLA-NMC)
Request for Comments: 433                             Nancy Neigus (BBN)
NIC 13491                                               22 December 1972
Categories: Socket Numbers
References: 349

                       Socket Number List

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:

Postel and Neigus                                               [Page 1]
RFC 433                    Socket Number List           22 December 1972

               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

Postel and Neigus                                               [Page 2]
RFC 433                    Socket Number List           22 December 1972

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

Postel and Neigus                                               [Page 3]
RFC 433                    Socket Number List           22 December 1972

      5    Echo

[include full document text]