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Network Working Group                              Jon Postel (UCLA-NMC)Request for Comments: 433                             Nancy Neigus (BBN)NIC 13491                                               22 December 1972Categories: Socket NumbersReferences: 349                       Socket Number ListThe czar of socket numbers [Jon Postel] has established thefollowing assignments for socket numbers used for publicfunctions. Note that a socket number is a 40 bit quantity, thefirst 8 bits being the host specification, the next 24 bits beingsite specific, and the last 8 bits being user specified - theselast 8 bits are called the AEN [it stands for, cleverly enough,Another Eightbit Number].For the assignments here the value in the host field rangesacross all hosts (unless otherwise specified), the value in the24 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 FunctionParticular 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             LINKThe specifications for the assigned functions can be found in thedocuments listed here:Postel and Neigus                                               [Page 1]

RFC 433                    Socket Number List           22 December 1972               TelnetRFC 318               File TransferRFC 354 &RFC 385               Remote Job EntryRFC 407               EchoRFC 347               DiscardRFC 348               Character GeneratorRFC 429               Speech Data Base        SUR 37               Datacomputer            [Murray @ CCA]               NCP MeasurmentRFC 388               Survey Data             [Kampe @ NMC]               LINK                    [Bressler @ BBN]It has come to our attention that there are several hostsperforming useful public services on sockets which conflict withthe above scheme. We hope we can resolve this problem with aminimum of disruption.The following is a tabulation of socket numbers together with theservices offered. This listing is presented as an aid to networkusers. If you know of a socket/function which has been left outor 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 = NJNPostel and Neigus                                               [Page 2]

RFC 433                    Socket Number List           22 December 1972We will be pleased to include socket/function information forother 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 TransferPostel and Neigus                                               [Page 3]

RFC 433                    Socket Number List           22 December 1972      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    TelnetPostel and Neigus                                               [Page 4]

RFC 433                    Socket Number List           22 December 1972   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 TransferFollowing 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 ]Postel and Neigus                                               [Page 5]