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Network Working Group Request for Comments: 503 NIC: 15747 References: 349, 433

N. Neigus J. Postel 13 April 1973

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 064 128 224 63 - 127 - 223 - 255 Assignment Network Wide Standard Functions Host Specific Functions Reserved for Future Use Any Experimental Function

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RFC 503

Socket Number List

13 April 1973

Particular Assignments: Socket 1 3 5 7 9 11 13 15 19 65 67 69 71 73 75 241 243 245 247 249 251 Assignment Telnet File Transfer Remote Job Entry Echo Discard Systat or who-is-on function Date-Time function Netstat or who-is-up function Character Generator [e.g. TTYTST] Speech Data Base @ 11-tx-2 (74) CPYNET NETRJS [EBCDIC] NETRJS [ASCII] NETRJS [TTY] NCP Measurement Survey Measurement LINK RSEXEC RSEXEC RSEXEC

The specifications for the assigned functions can be found in the documents listed here: Telnet File Transfer Remote Job Entry Echo Discard Character Generator Speech Data Base Datacomputer NCP Measurement Survey Data LINK RSEXEC NIC 7104 NIC 7104 NIC 7104 RFC 347 RFC 348 RFC 429 SUR 37 [Murray @ RFC 388 [Kampa @ [Bressler [Thomas @

CCA] NMC] @ BBN] 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.

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RFC 503

Socket Number List

13 April 1973

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 3 241 243 2 SRI-ARC 1 3 7 11 13 69 Telnet File Transfer Echo SYSTAT DATE-TIME CPYNET Telnet File Transfer NCP Measurement Survey Data

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RFC 503

Socket Number List

13 April 1973

3

UCSB 1 5 7 9 Telnet UCSB RJS [not ARPANET standard] Echo 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 3 5 7 9 13 6 Telnet File Transfer Echo CPYNET SYSTAT DATE-TIME

MIT-Multics 1 3 Telnet File Transfer

8

SDC-Adept 1 Telnet

9

Harvard 1 3 Telnet File Transfer

10

LL-67 1 Telnet

11

SAIL 1 3 Telnet File Transfer

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RFC 503

Socket Number List

13 April 1973

13

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

14

CMU 1 3 Telnet File Transfer

15

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

16

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

23

USC-44 1 Telnet

31

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

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RFC 503

Socket Number List

13 April 1973

35

UCSD 1 Telnet

65

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

66

SRI-AI 1 3 5 7 9 11 Telnet File Transfer Echo CPYNET SYSTAT 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 3 7 9 Telnet File Transfer Network Status Discard

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RFC 503

Socket Number List

13 April 1973

74

LL-TX-2 1 Telnet

78

CMU-alt 1 3 Telnet File Transfer

86

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

133 BBN-TENEXB 1 3 7 11 13 15 17 69 134 MIT-AI 1 3 Telnet File Transfer Telnet File Transfer Echo SYSTAT DATE-TIME NETSTAT Oneliners CPYNET

198 MIT-Mathlab 1 3 Telnet File Transfer

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RFC 503

Socket Number List

13 April 1973

User only hosts -- no server sockets 5 7 12 19 32 138 197 NCC RAND ILI-ANTS NBS-ANTS PARC-MAXC (currently) LL-TSP BBN-1D

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