RFC 755: Assigned numbers (original) (raw)
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Obsoleted by: 758 HISTORIC
Network Working Group J. Postel Request for Comments: 755 USC-ISI IEN: 93 3 May 1979
Obsoletes: 750, 739, 604, 503, 433, 349
ASSIGNED NUMBERSThis 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@ISIB
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](#ref-1 ""ARPANET Protocol Handbook,"")] prepared by the Network Information Center (NIC). In the lists that follow a bracketed number, e.g. [[1](#ref-1 ""ARPANET Protocol Handbook,"")], off to the right of the page indicates a reference for the listed protocol.
Postel [Page 1]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Link Numbers
ASSIGNED LINK NUMBERSThe 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](#ref-2 ""Specifications for the Interconnection of a Host and an IMP,"")].
Link Assignments:
Decimal Octal Description References
------- ----- ----------- ----------
0 0 AHHP Control Messages [[1](#ref-1 ""ARPANET Protocol Handbook,""),[3](#ref-3 ""Host/Host Protocol for the ARPA Network,"")]
1 1 Reserved
2-71 2-107 AHHP Regular Messages [[1](#ref-1 ""ARPANET Protocol Handbook,""),[3](#ref-3 ""Host/Host Protocol for the ARPA Network,"")]
72-151 110-227 Reserved
152 230 PARC Universal Protocol
153 231 TIP Status Reporting
154 232 TIP Accounting
155-158 233-236 Internet Protocol [[35](#ref-35 ""Specification of Internet Transmission Control Program -- TCP (version 2),""),[36](#ref-36 ""Specification of Internetwork Transmission Control Program -- TCP Version 3,""),[42](#ref-42 ""Draft Internetwork Protocol Specification -- Version 2,""),[43](#ref-43 ""A Proposed New Internet Header Format,""),[44](#ref-44 ""Internet Datagram Protocol -- Version 4,"")]
159-191 237-277 Measurements [[28](#ref-28 ""Formation of a Network Measurement Group (NMG),"")]
192-195 300-303 Message Switching Protocol [[4](#ref-4 "" A System for Interprocess Communication in a Resource Sharing Network,""),[5](#ref-5 ""A Proposed Experiment with a Message Switching Protocol,"")]
196-255 304-377 Experimental Protocols
224-255 340-377 NVP [[1](#ref-1 ""ARPANET Protocol Handbook,""),[39](#ref-39 ""Specifications for the Network Voice Protocol (NVP),"")]Postel [Page 2]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Socket Numbers
ASSIGNED SOCKET NUMBERSSockets are used in the AHHP [[1](#ref-1 ""ARPANET Protocol Handbook,""),[3](#ref-3 ""Host/Host Protocol for the ARPA Network,"")] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to all callers an Initial Connection Procedure ICP [[1](#ref-1 ""ARPANET Protocol Handbook,""),[34](#ref-34 ""Official Initial Connection Protocol,"")] is used between the user process and the server process. This list specifies the socket used by the server process as its contact socket.
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
Specific Assignments:
Network Standard Functions
Decimal Octal Description References
------- ----- ----------- ----------
1 1 Old Telnet [[6](#ref-6 ""Telnet Protocol,"")]
3 3 Old File Transfer [[7](#ref-7 ""File Transfer Protocol,""),[8](#ref-8 ""FTPSRV -- Extensions for Tenex Paged Files,""),[9](#ref-9 ""One More Try on the FTP,"")]
5 5 Remote Job Entry [[1](#ref-1 ""ARPANET Protocol Handbook,""),[10](#ref-10 ""Remote Job Entry Protocol,"")]
7 7 Echo [[11](#ref-11 ""Echo Process,"")]
9 11 Discard [[12](#ref-12 ""Discard Process,"")]
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](#ref-13 ""Character Generator Process,"")]
21 25 New File Transfer [[1](#ref-1 ""ARPANET Protocol Handbook,""),[14](#ref-14 ""File Transfer Protocol,""),[15](#ref-15 ""Revised FTP Reply Codes,"")]
23 27 New Telnet [[1](#ref-1 ""ARPANET Protocol Handbook,""),[16](#ref-16 ""Telnet Protocol Specification,""),[17](#ref-17 ""Telnet Option Specification,"")]
25 31 Distributed Programming System [[18](#ref-18 ""A High Level Framework for Network-Based Resource Sharing,""),[19](#ref-19 ""Elements of a Distributed Programming System,"")]
27 33 NSW User System w/COMPASS FE [[20](#ref-20 ""Semi-Annual Technical Report,"")]
29 35 MSG-3 ICP [[21](#ref-21 ""MSG: The Interprocess Communication Facility for the National Software Works,"")]
31 37 MSG-3 Authentication [[21](#ref-21 ""MSG: The Interprocess Communication Facility for the National Software Works,"")]
33 41 DPS ICP [[18](#ref-18 ""A High Level Framework for Network-Based Resource Sharing,""),[19](#ref-19 ""Elements of a Distributed Programming System,"")]
35 43 IO Station Spooler
37 45 Time Server [[1](#ref-1 ""ARPANET Protocol Handbook,""),[22](#ref-22 ""Time Server,"")]
39 47 NSW User System w/SRI FE [[20](#ref-20 ""Semi-Annual Technical Report,"")]Postel [Page 3]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Socket Numbers
41 51 Graphics [[1](#ref-1 ""ARPANET Protocol Handbook,""),[26](#ref-26 ""A Networks Graphics Protocol,"")]
42-63 52-77 unassigned
Host Specific Functions
Decimal Octal Description References
------- ----- ----------- ----------
65 101 Speech Data Base at LL-TX-2 [[23](#ref-23 ""Lincoln Speech Data Facility,"")]
67 103 Datacomputer at CCA [[24](#ref-24 ""Datacomputer Version 1 User Manual,"")]
69 105 CPYNET
71 107 NETRJS (EBCDIC) at UCLA-CCN [[1](#ref-1 ""ARPANET Protocol Handbook,""),[25](#ref-25 ""NETRJS Protocol,"")]
73 111 NETRJS (ASCII-68) at UCLA-CCN [[1](#ref-1 ""ARPANET Protocol Handbook,""),[25](#ref-25 ""NETRJS Protocol,"")]
75 113 NETRJS (ASCII-63) at UCLA-CCN [[1](#ref-1 ""ARPANET Protocol Handbook,""),[25](#ref-25 ""NETRJS Protocol,"")]
77 115 any private RJE server
79 117 Name or Finger [[1](#ref-1 ""ARPANET Protocol Handbook,""),[40](#ref-40 ""Name/Finger,"")]
81 121 Network BSYS
83 123 MIT ML Device
85 125 MIT ML Device
86-94 126-136 unassigned
95 137 SUPDUP [[33](#ref-33 ""SUPDUP Protocol,"")]
97 141 Datacomputer Status
98-127 142-136 unassigned
Reserved for Future Use
Decimal Octal Description References
------- ----- ----------- ----------
128-223 200-337 reserved
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](#ref-27 ""NCP Statistics,""),[28](#ref-28 ""Formation of a Network Measurement Group (NMG),"")]
243 363 Survey Measurement [[28](#ref-28 ""Formation of a Network Measurement Group (NMG),""),[29](#ref-29 ""A Report on the Survey Project,""),[30](#ref-30 ""Storing Network Survey Data at the Datacomputer,"")]
245 365 LINK [[31](#ref-31 ""Inter-Entity Communication -- An Experiment,"")]
247 367 TIPSRV
249-255 371-377 RSEXEC [[31](#ref-31 ""Inter-Entity Communication -- An Experiment,""),[32](#ref-32 ""A Resource Sharing Executive for the ARPANET,"")]Postel [Page 4]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Network Numbers
ASSIGNED NETWORK NUMBERSThis list of network numbers is used in the internetwork protocols now under development, 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 CHAOS Network
8 10 BBN-SAT-TEST BBN SATNET Test Network
9 11 BRAGG-PR Ft. Bragg Packet Radio Network
10 12 ARPANET ARPANET [[1](#ref-1 ""ARPANET Protocol Handbook,""),[2](#ref-2 ""Specifications for the Interconnection of a Host and an IMP,"")]
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 LCS Network [[37](#ref-37 ""Protocols for the LCS Network,""),[38](#ref-38 ""Revision of DSP Specification,"")]
19 23 TYMNET TYMNET
20 24 DC-PR Washington D.C. Packet Radio Network
21 25 EDN DCEC EDN
22 26 DIALNET DIALNET [[47](#ref-47 ""DIALNET,""),[48](#ref-48 ""DIALNET Protocols,"")]
23 27 MITREK MITREK Cable Network
24 30 BBN-LOCAL BBN Local Network
25 31 RSRE-PPSN RSRE / PPSN
26-254 32-376 Unassigned
255 377 ReservedPostel [Page 5]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Internet Message Versions
ASSIGNED INTERNET MESSAGE VERSIONSIn the internetwork protocols there is a field to identify the version of the internetwork general protocol. This field is 4 bits in size.
Assigned Internet Message Versions
Decimal Octal Version References
------- ----- ------- ----------
0 0 March 1977 version [[35](#ref-35 ""Specification of Internet Transmission Control Program -- TCP (version 2),"")]
1 1 January 1978 version [[36](#ref-36 ""Specification of Internetwork Transmission Control Program -- TCP Version 3,"")]
2 2 February 1978 version A [[42](#ref-42 ""Draft Internetwork Protocol Specification -- Version 2,"")]
3 3 February 1978 version B [[43](#ref-43 ""A Proposed New Internet Header Format,"")]
4 4 February 1979 version 4 [[44](#ref-44 ""Internet Datagram Protocol -- Version 4,"")]
5-14 5-16 Unassigned
15 17 ReservedPostel [Page 6]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Internet Protocol Numbers
ASSIGNED INTERNET PROTOCOL NUMBERSIn the internet protocol (IN) [[44](#ref-44 ""Internet Datagram Protocol -- Version 4,"")] 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 IN header.
Assigned Internet Protocol Numbers
Decimal Octal Protocol Numbers References
------- ----- ---------------- ----------
0 0 Reserved
1 1 raw internet datagrams [[44](#ref-44 ""Internet Datagram Protocol -- Version 4,"")]
2 2 TCP-3 [[36](#ref-36 ""Specification of Internetwork Transmission Control Program -- TCP Version 3,"")]
3 3 Gateway-to-Gateway [[49](#ref-49 ""Gateway Routing, An Implementation Specification,"")]
4 4 Gateway Monitoring Message [[41](#ref-41 ""Gateway Monitoring Messages,"")]
5 5 TCP-3.1 [[45](#ref-45 ""A Proposal for TCP Version 3.1 Header Format,"")]
6 6 TCP-4 [[46](#ref-46 ""Transmission Control Protocol -- Version 4,"")]
7 7 UCL
8 10 DSP [[37](#ref-37 ""Protocols for the LCS Network,""),[38](#ref-38 ""Revision of DSP Specification,"")]
9 11 Secure
10 12 TCP-2 [[35](#ref-35 ""Specification of Internet Transmission Control Program -- TCP (version 2),"")]
11-12 13-14 Unassigned
13 15 Pluribus
14 16 Telenet
15 17 XNET
16 20 Chaos
17 21 UDP [[50](#ref-50 ""User Datagram Protocol,"")]
18 22 Multiplexing [[51](#ref-51 ""Multiplexing Protocol,"")]
19-254 23-376 Unassigned
255 377 ReservedPostel [Page 7]
RFC 755 3 May 1979 IEN 93 Assigned Numbers Internet Message Types
ASSIGNED INTERNET MESSAGE TYPESIn the March 1977 internetwork protocol [[35](#ref-35 ""Specification of Internet Transmission Control Program -- TCP (version 2),"")] there is a field to identify the type of the message. This field is 4 bits in size.
Assigned Internet Message Types
Decimal Octal Type References
------- ----- ---- ----------
0 0 Raw Internet Packet
1 1 TCP-2 [[35](#ref-35 ""Specification of Internet Transmission Control Program -- TCP (version 2),"")]
2 2 Secure
3 3 Gateway
4 4 Measurement
5 5 DSP [[37](#ref-37 ""Protocols for the LCS Network,""),[38](#ref-38 ""Revision of DSP Specification,"")]
6 6 UCL
7-12 7-14 Reserved
13 15 Pluribus
14 16 Telenet
15 17 XnetPostel [Page 8]
RFC 755 3 May 1979 IEN 93 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, January 1976.
[3] McKenzie,A. "Host/Host Protocol for the ARPA Network," NIC 8246, January 1972. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[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](#ref-1 ""ARPANET Protocol Handbook,"")].
[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](#ref-1 ""ARPANET Protocol Handbook,"")].
[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](#ref-1 ""ARPANET Protocol Handbook,"")].
Postel [Page 9]
RFC 755 3 May 1979 IEN 93 Assigned Numbers References
[15] Postel, J. "Revised FTP Reply Codes," RFC 640, NIC 30843, 5 June 1974. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[16] McKenzie, A. "Telnet Protocol Specification," NIC 18639, August 1973. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[17] McKenzie, A. "Telnet Option Specification," NIC 18640, August 1973. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[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](#ref-1 ""ARPANET Protocol Handbook,"")].
[23] Armenti, A., D. Hall, and A. Stone. "Lincoln Speech Data Facility," SUR Note 37, NIC 10917, 14 July 1972.
[24] CCA, "Datacomputer Version 1 User Manual," Computer Corporation of America, August 1975.
[25] Braden, R. "NETRJS Protocol," RFC 740, NIC 42423, 22 November 1977. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[26] Sproull, R, and E. Thomas. "A Networks Graphics Protocol," NIC 24308, 16 August 1974. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[27] Cerf, V., "NCP Statistics," RFC 388, NIC 11360, 23 August 1972.
Postel [Page 10]
RFC 755 3 May 1979 IEN 93 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](#ref-1 ""ARPANET Protocol Handbook,"")].
[34] Postel, J. "Official Initial Connection Protocol," NIC 7101, 11 June 1971. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[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](#ref-1 ""ARPANET Protocol Handbook,"")].
[40] Harrenstien, K. "Name/Finger," RFC 742, NIC 42758, 30 December 1977. Also in [[1](#ref-1 ""ARPANET Protocol Handbook,"")].
[41] Cole, J. "Gateway Monitoring Messages," BBN, 1 February 1978.
[42] Postel, J. "Draft Internetwork Protocol Specification -- Version 2," USC-Information Sciences Institute, February 1978.
Postel [Page 11]
RFC 755 3 May 1979 IEN 93 Assigned Numbers References
[43] Cerf, V. "A Proposed New Internet Header Format," Advanced Research Projects Agency, IEN 26, 14 February 1978.
[44] Postel, J. "Internet Datagram Protocol -- Version 4," IEN-80, USC-Information Sciences Institute, February 1979.
[45] Cerf, V. "A Proposal for TCP Version 3.1 Header Format," Advanced Research Projects Agency, IEN 26, 14 February 1978.
[46] Postel, J., "Transmission Control Protocol -- Version 4," IEN-81, USC-Information Sciences Institute, February 1979.
[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, and R. Perlman, "Gateway Routing, An Implementation Specification," IEN-30, Bolt Berenak and Newman, April 1978.
[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.
Postel [Page 12]