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Network Working Group J. Postel
Request for Comments: 770 ISI
September 1980
Obsoletes RFCs: 762, 758, 755,
750, 739, 604, 503, 433, 349
Obsoletes IENs: 127, 117, 93
ASSIGNED NUMBERS
This Network Working Group Request for Comments documents the currently
assigned values from several series of numbers used in network protocol
implementations. This RFC will be updated periodically, and in any case
current information can be obtained from Jon Postel. The assignment of
numbers is also handled by Jon. If you are developing a protocol or
application that will require the use of a link, socket, etc. please
contact Jon to receive a number assignment.
Jon Postel
USC - Information Sciences Institute
4676 Admiralty Way
Marina del Rey, California 90291
phone: (213) 822-1511
ARPANET mail: POSTEL@ISIF
Most of the protocols mentioned here are documented in the RFC series of
notes. The more prominent and more generally used are documented in the
Protocol Handbook [1] prepared by the Network Information Center (NIC).
In the lists that follow a bracketed number, e.g. [1], off to the right
of the page indicates a reference for the listed protocol.
Postel [Page 1]
RFC 770 September 1980
Assigned Numbers
Network Numbers
ASSIGNED NETWORK NUMBERS
This list of network numbers is used in the internet, the field is
8 bits in size.
Assigned Network Numbers
Decimal Octal Name Network References
------- ----- ---- ------- ----------
0 0 Reserved
1 1 BBN-PR BBN Packet Radio Network
2 2 SF-PR-1 SF Bay Area Packet Radio Network (1)
3 3 BBN-RCC BBN RCC Network
4 4 SATNET Atlantic Satellite Network
5 5 SILL-PR Ft. Sill Packet Radio Network
6 6 SF-PR-2 SF Bay Area Packet Radio Network (2)
7 7 CHAOS MIT CHAOS Network
8 10 CLARKNET SATNET subnet for Clarksburg
9 11 BRAGG-PR Ft. Bragg Packet Radio Network
10 12 ARPANET ARPANET [1,2]
11 13 UCLNET University College London Network
12 14 CYCLADES CYCLADES
13 15 NPLNET National Physical Laboratory
14 16 TELENET TELENET
15 17 EPSS British Post Office EPSS
16 20 DATAPAC DATAPAC
17 21 TRANSPAC TRANSPAC
18 22 LCSNET MIT LCS Network [37,38]
19 23 TYMNET TYMNET
20 24 DC-PR Washington D.C. Packet Radio Network
21 25 EDN DCEC EDN
22 26 DIALNET DIALNET [47,48]
23 27 MITRE MITRE Cablenet [23]
24 30 BBN-LOCAL BBN Local Network
25 31 RSRE-PPSN RSRE / PPSN
26 32 AUTODIN-II AUTODIN II
27 33 NOSC-LCCN NOSC / LCCN
28 34 WIDEBAND Wide Band Satellite Network
29 35 DCN-COMSAT COMSAT Distributed Computing Network
30 36 DCN-UCL UCL Distributed Computing Network
31 37 BBN-SAT-TEST BBN SATNET Test Network
32 40 UCL-CR1 UCL Cambridge Ring 1
33 41 UCL-CR2 UCL Cambridge Ring 2
34 42 MATNET Mobile Access Terminal Network
35 43 NULL UCL/RSRE Null Network
36 44 SU-NET Stanford University Ethernet
Postel [Page 2]
RFC 770 September 1980
Assigned Numbers
Network Numbers
37 45 DECNET Digital Equipment Network
38 46 DECNET-TEST Test Digital Equipment Network
39-254 47-376 Unassigned
255 377 Reserved
Postel [Page 3]
RFC 770 September 1980
Assigned Numbers
Internet Protocol Versions
ASSIGNED INTERNET PROTOCOL VERSIONS
In the Internet Protocol (IP) there is a field to identify the
version of the internetwork general protocol. This field is 4 bits
in size.
Assigned Internet Protocol Versions
Decimal Octal Version References
------- ----- ------- ----------
0 0 March 1977 version [35]
1-3 1-3 Unassigned
4 4 January 1980 version [44]
5 5 ST Datagram Mode [45]
6-14 6-16 Unassigned
15 17 Reserved
Postel [Page 4]
RFC 770 September 1980
Assigned Numbers
Internet Protocol Numbers
ASSIGNED INTERNET PROTOCOL NUMBERS
In the Internet Protocol (IP) [44] there is a field to identify the
the next level protocol. This field is 8 bits in size. This field
is called Protocol in the IP header.
Assigned Internet Protocol Numbers
Decimal Octal Protocol Numbers References
------- ----- ---------------- ----------
0 0 Reserved
1 1 raw internet datagrams [44]
2 2 TCP-3 [36]
3 3 Gateway-to-Gateway [49]
4 4 Gateway Monitoring Message [41]
5 5 ST [45]
6 6 TCP-4 [46]
7 7 UCL
8 10 DSP [37,38]
9 11 Secure
10 12 TCP-2 [35]
11 13 NVP [39]
12 14 PUP [55]
13 15 Pluribus
14 16 Telenet
15 17 XNET
16 20 Chaos
17 21 User Datagram [50]
18 22 Multiplexing [51]
19 23 DCN
20-62 24-76 Unassigned
63 77 any local network
64 100 EXPAK cumstats
65 101 EXPAK PC messages
66 102 Unassigned
67 103 Gateway Monitoring
68 104 Unassigned
69 105 SIMP monitoring
70 106 SIMP polling
71 107 SIMP packet core/U
72-76 110-114 Unassigned
77 115 backroom SIMP polling
78 116 backroom SIMP monitoring
79 117 SIMP message generators
80-254 120-376 Unassigned
255 377 Reserved
Postel [Page 5]
RFC 770 September 1980
Assigned Numbers
Port or Socket Numbers
ASSIGNED PORT or SOCKET NUMBERS
Ports are used in the TCP [46] and sockets are used in the AHHP [1,3]
to name the ends of logical connections which carry long term
conversations. For the purpose of providing services to unknown
callers a service contact socket is defined. This list specifies the
port or socket used by the server process as its contact socket. In
the AHHP an Initial Connection Procedure ICP [1,34] is used between
the user process and the server process to make the initial contact
and establish the long term connections leaving the contact socket
free to handle other callers. In the TCP no ICP is necessary since a
port may engage in many simultaneous connections.
The assigned ports/sockets use a small part of the possible
port/socket numbers. The ports/assigned sockets have all except the
low order eight bits cleared to zero. The low order eigth bits are
specified here.
Socket Assignments:
General Assignments:
Decimal Octal Description
------- ----- -----------
0-63 0-77 Network Wide Standard Function
64-127 100-177 Hosts Specific Functions
128-223 200-337 Reserved for Future Use
224-255 340-377 Any Experimental Function
Postel [Page 6]
RFC 770 September 1980
Assigned Numbers
Port or Socket Numbers
Specific Assignments:
Network Standard Functions
Decimal Octal Description References
------- ----- ----------- ----------
1 1 Old Telnet [6]
3 3 Old File Transfer [7,8,9]
5 5 Remote Job Entry [1,10]
7 7 Echo [11]
9 11 Discard [12]
11 13 Who is on or SYSTAT
13 15 Date and Time
15 17 Who is up or NETSTAT
17 21 Short Text Message
19 23 Character generator or TTYTST [13]
21 25 New File Transfer [1,14,15]
23 27 New Telnet [1,16,17]
25 31 Distributed Programming System [18,19]
27 33 NSW User System w/COMPASS FE [20]
29 35 MSG-3 ICP [21]
31 37 MSG-3 Authentication [21]
33 41 DPS ICP [18,19]
35 43 IO Station Spooler
37 45 Time Server [1,22]
39 47 NSW User System w/SRI FE [20]
41 51 Graphics [1,26]
42 52 Name Server [52]
43 53 WhoIs
45 55 Internet Message Processing Module [53]
47 57 NI FTP [54]
49 61 RAND Network Graphics Conference [56]
51 63 Simple Internet Mail
53 65 AUTODIN II FTP [57]
55 67 ISI Graphics Language [58]
57 71 Mail Transfer [43]
59-63 73-77 unassigned
Postel [Page 7]
RFC 770 September 1980
Assigned Numbers
Port or Socket Numbers
Host Specific Functions
Decimal Octal Description References
------- ----- ----------- ----------
65 101 unassigned
67 103 Datacomputer at CCA [24]
69 105 CPYNET
69 105 Trivial File Transfer [42]
71 107 NETRJS (EBCDIC) at UCLA-CCN [1,25]
73 111 NETRJS (ASCII-68) at UCLA-CCN [1,25]
75 113 NETRJS (ASCII-63) at UCLA-CCN [1,25]
77 115 any private RJE server
79 117 Name or Finger [1,40]
81 121 Network BSYS
83 123 MIT ML Device
85 125 MIT ML Device
87 127 any terminal link
89 131 SU/MIT Telnet Gateway
91-94 133-136 unassigned
95 137 SUPDUP [33]
97 141 Datacomputer Status
99 143 CADC - NIFTP via UCL
101 145 NPL - NIFTP via UCL
103 147 BNPL - NIFTP via UCL
105 151 CAMBRIDGE - NIFTP via UCL
107 153 HARWELL - NIFTP via UCL
109 155 SWURCC - NIFTP via UCL
111 157 ESSEX - NIFTP via UCL
113 161 RUTHERFORD - NIFTP via UCL
115-127 163-177 unassigned
Reserved for Future Use
Decimal Octal Description References
------- ----- ----------- ----------
128-223 200-337 reserved
Postel [Page 8]
RFC 770 September 1980
Assigned Numbers
Port or Socket Numbers
Experimental Functions
Decimal Octal Description References
------- ----- ----------- ----------
224-231 340-347 unassigned
232-237 350-355 Authorized Mailer at BBN
239 357 unassigned
241 361 NCP Measurement [27,28]
243 363 Survey Measurement [28,29,30]
245 365 LINK [31]
247 367 TIPSRV
249-255 371-377 RSEXEC [31,32]
Postel [Page 9]
RFC 770 September 1980
Assigned Numbers
Link Numbers
ASSIGNED LINK NUMBERS
The word "link" here refers to a field in the original ARPANET
Host/IMP interface leader. The link was originally defined as an 8
bit field. Some time after the ARPANET Host-to-Host (AHHP) protocol
was defined and, by now, some time ago the definition of this field
was changed to "Message-ID" and the length to 12 bits. The name link
now refers to the high order 8 bits of this 12 bit message-id field.
The low order 4 bits of the message-id field are to be zero unless
specifically specified otherwise for the particular protocol used on
that link. The Host/IMP interface is defined in BBN report 1822 [2].
Link Assignments:
Decimal Octal Description References
------- ----- ----------- ----------
0 0 AHHP Control Messages [1,3]
1 1 Reserved
2-71 2-107 AHHP Regular Messages [1,3]
72-150 110-226 Reserved
151 227 CHAOS Protocol
152 230 PARC Universal Protocol
153 231 TIP Status Reporting
154 232 TIP Accounting
155 233 Internet Protocol (regular traffic) [44]
156-158 234-236 Internet Protocol (experimental traffic) [44]
159-191 237-277 Measurements [28]
192-195 300-303 Message Switching Protocol [4,5]
196-255 304-377 Experimental Protocols
224-255 340-377 NVP [1,39]
248-255 370-377 Network Maintenance
Postel [Page 10]
RFC 770 September 1980
Assigned Numbers
References
REFERENCES
[1] Feinler, E. and J. Postel, eds., "ARPANET Protocol Handbook,"
NIC 7104, for the Defense Communications Agency by SRI
International, Menlo Park, California, Revised January 1978.
[2] BBN, "Specifications for the Interconnection of a Host and an
IMP," Report 1822, Bolt Beranek and Newman, Cambridge,
Massachusetts, May 1978.
[3] McKenzie,A. "Host/Host Protocol for the ARPA Network,"
NIC 8246, January 1972. Also in [1].
[4] Walden, D. " A System for Interprocess Communication in a
Resource Sharing Network," RFC 62, NIC 4962, 3 August 1970.
Also published in Communications of the ACM, volume 15,
number 4, April 1972.
[5] Bressler, B. "A Proposed Experiment with a Message Switching
Protocol," RFC 333, NIC 9926, 15 May 72.
[6] Postel, J. "Telnet Protocol," RFC 318, NIC 9348, 3 April 1972.
[7] McKenzie, A. "File Transfer Protocol," RFC 454, NIC 14333,
16 February 1973.
[8] Clements, R. "FTPSRV -- Extensions for Tenex Paged Files,"
RFC 683, NIC 32251, 3 April 1975. Also in [1].
[9] Harvey, B. "One More Try on the FTP," RFC 691, NIC 32700,
6 June 1975.
[10] Bressler, B. "Remote Job Entry Protocol," RFC 407, NIC 12112,
16 October 72. Also in [1].
[11] Postel, J. "Echo Process," RFC 347, NIC 10426, 30 May 1972.
[12] Postel, J. "Discard Process," RFC 348, NIC 10427,
30 May 1972.
[13] Postel, J. "Character Generator Process," RFC 429, NIC 13281,
12 December 1972.
[14] Neigus, N. "File Transfer Protocol," RFC 542, NIC 17759,
12 July 1973. Also in [1].
Postel [Page 11]
RFC 770 September 1980
Assigned Numbers
References
[15] Postel, J. "Revised FTP Reply Codes," RFC 640, NIC 30843,
5 June 1974. Also in [1].
[16] McKenzie, A. "Telnet Protocol Specification," NIC 18639,
August 1973. Also in [1].
[17] McKenzie, A. "Telnet Option Specification," NIC 18640,
August 1973. Also in [1].
[18] White, J. "A High Level Framework for Network-Based Resource
Sharing," RFC 707, NIC 34263, 14 January 1976. Also in NCC
Proceedings, AFIPS, June 1976.
[19] White, J. "Elements of a Distributed Programming System,"
RFC 708, NIC 34353, 28 January 1976.
[20] COMPASS. "Semi-Annual Technical Report," CADD-7603-0411,
Massachusetts Computer Associates, 4 March 1976. Also as,
"National Software Works, Status Report No. 1,"
RADC-TR-76-276, Volume 1, September 1976. And COMPASS. "Second
Semi-Annual Report," CADD-7608-1611, Massachusetts Computer
Associates, 16 August 1976.
[21] NSW Protocol Committee, "MSG: The Interprocess Communication
Facility for the National Software Works," CADD-7612-2411,
Massachusetts Computer Associates, BBN 3237, Bolt Beranek and
Newman, Revised 24 December 1976.
[22] Harrenstien, K. "Time Server," RFC 738, NIC 42218,
31 October 1977. Also in [1].
[23] Skelton, A., S. Holmgren, and D. Wood, "The MITRE Cablenet
Project," IEN 96, April 1979.
[24] CCA, "Datacomputer Version 5/4 User Manual," Computer
Corporation of America, August 1979.
[25] Braden, R. "NETRJS Protocol," RFC 740, NIC 42423,
22 November 1977. Also in [1].
[26] Sproull, R, and E. Thomas. "A Networks Graphics Protocol,"
NIC 24308, 16 August 1974. Also in [1].
[27] Cerf, V., "NCP Statistics," RFC 388, NIC 11360,
23 August 1972.
Postel [Page 12]
RFC 770 September 1980
Assigned Numbers
References
[28] Cerf, V., "Formation of a Network Measurement Group (NMG),"
RFC 323, NIC 9630, 23 March 1972.
[29] Bhushan, A., "A Report on the Survey Project," RFC 530,
NIC 17375, 22 June 1973.
[30] Cantor, D., "Storing Network Survey Data at the Datacomputer,"
RFC 565, NIC 18777, 28 August 1973.
[31] Bressler, R., "Inter-Entity Communication -- An Experiment,"
RFC 441, NIC 13773, 19 January 1973.
[32] Thomas, R. "A Resource Sharing Executive for the ARPANET,"
AFIPS Conference Proceedings, 42:155-163, NCC, 1973.
[33] Crispin, M. "SUPDUP Protocol," RFC 734, NIC 41953,
7 October 1977. Also in [1].
[34] Postel, J. "Official Initial Connection Protocol," NIC 7101,
11 June 1971. Also in [1].
[35] Cerf, V. "Specification of Internet Transmission Control
Program -- TCP (version 2)," March 1977.
[36] Cerf, V. and J. Postel, "Specification of Internetwork
Transmission Control Program -- TCP Version 3,"
USC/Information Sciences Institute, January 1978.
[37] Reed, D. "Protocols for the LCS Network," Local Network Note
3, Laboratory for Computer Science, MIT, 29 November 1976.
[38] Clark, D. "Revision of DSP Specification," Local Network Note
9, Laboratory for Computer Science, MIT, 17 June 1977.
[39] Cohen, D. "Specifications for the Network Voice Protocol
(NVP)," NSC Note 68, 29 January 1976. Also as USC/Information
Sciences Institute RR-75-39, March 1976, and as RFC 741,
NIC 42444, 22 November 1977. Also in [1].
[40] Harrenstien, K. "Name/Finger," RFC 742, NIC 42758,
30 December 1977. Also in [1].
[41] Cole, J. "Gateway Monitoring Messages," BBN, 1 February 1978.
[42] Sollins, K. "The TFTP Protocol," IEN 133, MIT/LCS,
January 1980.
Postel [Page 13]
RFC 770 September 1980
Assigned Numbers
References
[43] Sluizer, S., and J. Postel, "Mail Transfer Protocol," RFC 772,
USC/Information Sciences Institute, September 1980.
[44] Postel, J. "DOD Standard Internet Protocol," IEN 128, RFC 760,
USC/Information Sciences Institute, January 1980.
[45] Forgie, J. "ST - A Proposed Internet Stream Protocol,"
IEN 119, M.I.T. Lincoln Laboratory, September 1979.
[46] Postel, J., "DOD Standard Transmission Control Protocol,"
IEN 129, RFC 761, USC/Information Sciences Institute,
January 1980.
[47] McCarthy, J. and L. Earnest, "DIALNET," Stanford University
Artificial Intelligence Laboratory, Undated.
[48] Crispin, M. and I. Zabala, "DIALNET Protocols," Stanford
University Artificial Intelligence Laboratory, July 1978.
[49] Strazisar, V., "How to Build a Gateway," IEN 109, Bolt Berenak
and Newman, August 1979.
[50] Postel, J., "User Datagram Protocol," IEN 88, USC/Information
Sciences Institute, May 1979.
[51] Cohen, D. and J. Postel, "Multiplexing Protocol," IEN 90,
USC/Information Sciences Institute, May 1979.
[52] Postel, J., "Name Server," IEN 116, USC/Information Sciences
Institute, August 1979.
[53] Postel, J., "Internet Message Protocol," RFC 759, IEN 113,
USC/Information Sciences Institute, August 1980.
[54] The High Level Protocol Group, "A Network Independent File
Transfer Protocol," INWG Protocol Note 86, December 1977.
[55] Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An
Internetwork Architecture," XEROX Palo Alto Research Center,
CSL-79-10, July 1979.
[56] O'Brien, M., "A Network Graphical Conferencing System," RAND
Corporation, N-1250-ARPA, August 1979.
[57] Forsdick, H., and A. McKenzie, "FTP Functional Specification,"
Bolt Beranek and Newman, Report 4051, August 1979.
Postel [Page 14]
RFC 770 September 1980
Assigned Numbers
References
[58] Bisbey, R., D. Hollingworth, B. Britt, and G. Mellstrom,
"Graphics Language (version 2)," USC/Information Sciences
Institute, June 1979.
Postel [Page 15]
