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:
Telnet RFC318 File Transfer RFC354 & RFC385 Remote Job Entry RFC407 Echo RFC347 Discard RFC348 Character Generator RFC429 Speech Data Base SUR 37 Datacomputer [Murray @ CCA] NCP Measurment RFC388 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].
