rfc943.txt
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Network Working Group J. Reynolds
Request for Comments: 943 J. Postel
ISI
Obsoletes RFCs: 923, 900, 870, April 1985
820, 790, 776, 770, 762, 758,
755, 750, 739, 604, 503, 433, 349
Obsoletes IENs: 127, 117, 93
ASSIGNED NUMBERS
Status of this Memo
This memo is an official status report on the numbers used in
protocols in the ARPA-Internet community. Distribution of this memo
is unlimited.
Introduction
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 Joyce Reynolds. The assignment of numbers is also handled by
Joyce. If you are developing a protocol or application that will
require the use of a link, socket, port, protocol, network number,
etc., please contact Joyce to receive a number assignment.
Joyce Reynolds
USC - Information Sciences Institute
4676 Admiralty Way
Marina del Rey, California 90292-6695
Phone: (213) 822-1511
ARPA mail: JKREYNOLDS@USC-ISIF.ARPA
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 "Internet Protocol Transition Workbook" [35] or in the old
"ARPANET Protocol Handbook" [36] prepared by the NIC. Some of the
items listed are undocumented. Further information on protocols can
be found in the memo "Official ARPA-Internet Protocols" [92].
In all cases the name and mailbox of the responsible individual is
indicated. In the lists that follow, a bracketed entry, e.g.,
[nn,iii], at the right hand margin of the page indicates a reference
for the listed protocol, where the number ("nn") cites the document
and the letters ("iii") cites the person. Whenever possible, letters
are a NIC Ident as used in the WHOIS service.
Reynolds & Postel [Page 1]
Assigned Numbers RFC 943
Network Numbers
ASSIGNED NETWORK NUMBERS
The network numbers listed here are used as internet addresses by the
Internet Protocol (IP) [35,80]. The IP uses a 32-bit address field
and divides that address into a network part and a "rest" or local
address part. The division takes 3 forms or classes.
The first type of address, or class A, has a 7-bit network number
and a 24-bit local address. The highest-order bit is set to 0.
This allows 128 class A networks.
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0| NETWORK | Local Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Class A Address
The second type of address, class B, has a 14-bit network number
and a 16-bit local address. The two highest-order bits are set to
1-0. This allows 16,384 class B networks.
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 0| NETWORK | Local Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Class B Address
The third type of address, class C, has a 21-bit network number
and a 8-bit local address. The three highest-order bits are set
to 1-1-0. This allows 2,097,152 class C networks.
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 1 0| NETWORK | Local Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Class C Address
Note: No addresses are allowed with the three highest-order bits
set to 1-1-1. These addresses (sometimes called "class D") are
reserved.
Reynolds & Postel [Page 2]
Assigned Numbers RFC 943
Network Numbers
One commonly used notation for internet host addresses divides the
32-bit address into four 8-bit fields and specifies the value of each
field as a decimal number with the fields separated by periods. This
is called the "dotted decimal" notation. For example, the internet
address of USC-ISIF.ARPA in dotted decimal is 010.002.000.052, or
10.2.0.52.
The dotted decimal notation will be used in the listing of assigned
network numbers. The class A networks will have nnn.rrr.rrr.rrr, the
class B networks will have nnn.nnn.rrr.rrr, and the class C networks
will have nnn.nnn.nnn.rrr, where nnn represents part or all of a
network number and rrr represents part or all of a local address.
There are four catagories of users of Internet Addresses: Research,
Defense, Government (Non-Defense), and Commercial. To reflect the
allocation of network identifiers among the categories, a
one-character code is placed to the left of the network number: R for
Research, D for Defense, G for Government, and C for Commercial (see
Appendix A for further details on this division of the network
identification).
Network numbers are assigned for networks that are connected to the
ARPA-Internet and DDN-Internet, and for independent networks that use
the IP family protocols (these are usually commercial). These
independent networks are marked with an asterisk preceding the
number.
The administrators of independent networks must apply separately for
permission to interconnect their network with either the
ARPA-Internet of the DDN-Internet. Independent networks need not be
listed in the working tables of either the ARPA-Internet or
DDN-Internet hosts or gateways.
For various reasons, the assigned numbers of networks are sometimes
changed. To ease the transition the old number will be listed for a
transition period as well. These "old number" entries will be marked
with a "T" following the number and preceding the name, and the
network name will be suffixed "-TEMP".
Special Addresses:
In certain contexts, it is useful to have fixed addresses with
functional significance rather than as identifiers of specific
hosts. When such usage is called for, the address zero is to be
interpreted as meaning "this", as in "this network". The address
of all ones are to be interpreted as meaning "all", as in "all
hosts". For example, the address 128.9.255.255 could be
Reynolds & Postel [Page 3]
Assigned Numbers RFC 943
Network Numbers
interpreted as meaning all hosts on the network 128.9. Or, the
address 0.0.0.37 could be interpreted as meaning host 37 on this
network.
Assigned Network Numbers
Class A Networks
* Internet Address Name Network References
- ---------------- ---- ------- ----------
000.rrr.rrr.rrr Reserved [JBP]
R 004.rrr.rrr.rrr SATNET Atlantic Satellite Network[DM11]
D 006.rrr.rrr.rrr T YPG-NET-TEMP Yuma Proving Grounds [8,BXA]
D 007.rrr.rrr.rrr T EDN-TEMP DCEC EDN [EC5]
R 008.rrr.rrr.rrr T BBN-NET-TEMP BBN Network [JSG5]
R 010.rrr.rrr.rrr ARPANET ARPANET [8,36,REK2]
D 011.rrr.rrr.rrr DODIIS DoD INTEL INFO SYS [AY7]
C 012.rrr.rrr.rrr ATT ATT, Bell Labs [MH12]
C 014.rrr.rrr.rrr PDN Public Data Network [REK4]
R 018.rrr.rrr.rrr T MIT-TEMP MIT Network [17,91,DDC2]
D 021.rrr.rrr.rrr DDN-RVN DDN-RVN [MLC]
D 022.rrr.rrr.rrr DISNET DISNET [FLM2]
D 023.rrr.rrr.rrr DDN-TC-NET DDN-TestCell-Network [DH17]
D 024.rrr.rrr.rrr MINET MINET [8,DHH]
R 025.rrr.rrr.rrr RSRE-EXP-NET RSRE [RNM1]
D 026.rrr.rrr.rrr MILNET MILNET [FLM2]
R 027.rrr.rrr.rrr T NOSC-LCCN-TEMPNOSC / LCCN [RH6]
R 028.rrr.rrr.rrr WIDEBAND Wide Band Satellite Net [CJW2]
D 029.rrr.rrr.rrr T MILX25-TEMP MILNET X.25 Temp [MLC]
D 030.rrr.rrr.rrr T ARPAX25-TEMP ARPA X.25 Temp [MLC]
R 032.rrr.rrr.rrr UCL-TAC UCL TAC [PK]
R 036.rrr.rrr.rrr T SU-NET-TEMP Stanford University Network[JCM]
R 039.rrr.rrr.rrr T SRINET-TEMP SRI Local Network [GEOF]
R 041.rrr.rrr.rrr BBN-TEST-A BBN-GATE-TEST-A [RH6]
R 044.rrr.rrr.rrr AMPRNET Amateur Radio Experiment Net[HM]
001.rrr.rrr.rrr-003.rrr.rrr.rrr Unassigned [JBP]
005.rrr.rrr.rrr Unassigned [JBP]
009.rrr.rrr.rrr Unassigned [JBP]
013.rrr.rrr.rrr Unassigned [JBP]
015.rrr.rrr.rrr-017.rrr.rrr.rrr Unassigned [JBP]
019.rrr.rrr.rrr-020.rrr.rrr.rrr Unassigned [JBP]
031.rrr.rrr.rrr Unassigned [JBP]
033.rrr.rrr.rrr-035.rrr.rrr.rrr Unassigned [JBP]
037.rrr.rrr.rrr-038.rrr.rrr.rrr Unassigned [JBP]
040.rrr.rrr.rrr Unassigned [JBP]
042.rrr.rrr.rrr-043.rrr.rrr.rrr Unassigned [JBP]
045.rrr.rrr.rrr-126.rrr.rrr.rrr Unassigned [JBP]
127.rrr.rrr.rrr Reserved [JBP]
Reynolds & Postel [Page 4]
Assigned Numbers RFC 943
Network Numbers
Class B Networks
* Internet Address Name Network References
- ---------------- ---- ------- ----------
128.000.rrr.rrr Reserved [JBP]
R 128.001.rrr.rrr BBN-TEST-B BBN-GATE-TEST-B [RH6]
R 128.002.rrr.rrr CMU-NET CMU-Ethernet [HDW2]
R 128.003.rrr.rrr LBL-CSAM LBL-CSAM-RESEARCH [JS38]
R 128.004.rrr.rrr DCNET LINKABIT DCNET [62,DLM1]
R 128.005.rrr.rrr FORDNET FORD DCNET [62,DLM1]
R 128.006.rrr.rrr RUTGERS RUTGERS [CLH3]
R 128.007.rrr.rrr DFVLR DFVLR DCNET Network [HDC1]
R 128.008.rrr.rrr UMDNET Univ of Maryland DCNET [62,DLM1]
R 128.009.rrr.rrr ISI-NET USC-ISI Local Network [CMR]
R 128.010.rrr.rrr PURDUE-CS-NET Purdue Computer Science [CAK]
R 128.011.rrr.rrr BBN-CRONUS BBN DOS Project [57,WIM]
R 128.012.rrr.rrr SU-NET Stanford University Net [JCM]
D 128.013.rrr.rrr MATNET Mobile Access Terminal Net[DM11]
R 128.014.rrr.rrr BBN-SAT-TEST BBN SATNET Test Net [DM11]
R 128.015.rrr.rrr S1NET LLL-S1-NET [EAK1]
R 128.016.rrr.rrr UCLNET University College London [PK]
D 128.017.rrr.rrr MATNET-ALT Mobile Access Terminal Alt[DM11]
R 128.018.rrr.rrr SRINET SRI Local Network [GEOF]
D 128.019.rrr.rrr EDN DCEC EDN [EC5]
D 128.020.rrr.rrr BRLNET BRLNET [8,MJM2]
R 128.021.rrr.rrr SF-PR-1 SF-1 Packet Radio Network [JEM]
R 128.022.rrr.rrr SF-PR-2 SF-2 Packet Radio Network [JEM]
R 128.023.rrr.rrr BBN-PR BBN Packet Radio Network [JAW3]
R 128.024.rrr.rrr ROCKWELL-PR Rockwell Packet Radio Net [EHP]
D 128.025.rrr.rrr BRAGG-PR Ft. Bragg Packet Radio Net [JEM]
D 128.026.rrr.rrr SAC-PR SAC Packet Radio Network [BG5]
D 128.027.rrr.rrr DEMO-PR-1 Demo-1 Packet Radio Network[LCS]
D 128.028.rrr.rrr C3-PR Testbed Development PR NET [BG5]
R 128.029.rrr.rrr MITRE MITRE Cablenet [99,APS]
R 128.030.rrr.rrr MIT-NET MIT Local Network [DDC2]
R 128.031.rrr.rrr MIT-RES MIT Research Network [DDC2]
R 128.032.rrr.rrr UCB-ETHER UC Berkeley Ethernet [DAM1]
R 128.033.rrr.rrr BBN-NET BBN Network [JSG5]
R 128.034.rrr.rrr NOSC-LCCN NOSC / LCCN [RH6]
R 128.035.rrr.rrr CISLTESTNET1 Honeywell [48,49,RK1]
R 128.036.rrr.rrr YALE-NET YALE NET [113,JO5]
D 128.037.rrr.rrr YPG-NET Yuma Proving Grounds [8,BXA]
D 128.038.rrr.rrr NSWC-NET NSWC Local Host Net [RLH2]
R 128.039.rrr.rrr NTANET NDRE-TIU [PS3]
R 128.040.rrr.rrr UCL-NET-A UCL [RC7]
R 128.041.rrr.rrr UCL-NET-B UCL [RC7]
R 128.042.rrr.rrr RICE-NET Rice University [62,113,PGM]
R 128.043.rrr.rrr DRENET Canada REF ARPANET [8,JR17]
Reynolds & Postel [Page 5]
Assigned Numbers RFC 943
Network Numbers
D 128.044.rrr.rrr WSMR-NET White Sands Network [TBS]
C 128.045.rrr.rrr DEC-WRL-NET DEC WRL Network [113,RKJ2]
R 128.046.rrr.rrr PURDUE-NET Purdue Campus Network [CAK]
D 128.047.rrr.rrr TACTNET Tactical Packet Net [7,KTP]
C*128.048.rrr.rrr UCDLA-NET UCDLA MELVYL Network [8,CXL]
R 128.049.rrr.rrr NOSC-ETHER NOSC Ethernet [113,RLB3]
G 128.050.rrr.rrr COINS COINS On-Line Intel Net [RLS6]
G 128.051.rrr.rrr COINSTNET COINS TEST NETWORK [RLS6]
R 128.052.rrr.rrr MIT-AI-NET MIT AI NET [113,MDC]
R 128.053.rrr.rrr SAC-PR-2 SAC PRNET Number 2 [BG5]
R 128.054.rrr.rrr UCSD UC San Diego Network [113,GH29]
R*128.055.rrr.rrr MFENET LLNL MFE Network [97,DRP]
D 128.056.rrr.rrr USNA-NET US Naval Academy Network [TXS]
D 128.057.rrr.rrr DEMO-PR-2 Demo-2 Packet Radio Net [LCS]
C*128.058.rrr.rrr SPAR Schlumberger PA Net [113,RXB]
R 128.059.rrr.rrr CU-NET Columbia University [113,LH2]
D 128.060.rrr.rrr NRL-LAN NRL Lab Area Net [WF3]
R*128.061.rrr.rrr GATECH Georgia Tech [113,SXA]
R 128.062.rrr.rrr MCC-NET MCC Corporate Net [113,CBD]
R 128.063.rrr.rrr BRL-SUBNET BRL-SUBNET-EXP [RBN1]
R 128.064.rrr.rrr-128.079.rrr.rrr Net Dynamics Exp [ZSU]
D 128.080.rrr.rrr CECOMNET CECOM EPR NET [PFS2]
128.081.rrr.rrr-191.254.rrr.rrr Unassigned [JBP]
191.255.rrr.rrr Reserved [JBP]
Class C Networks
* Internet Address Name Network References
- ---------------- ---- ------- ----------
192.000.000.rrr Reserved [JBP]
R 192.000.001.rrr BBN-TEST-C BBN-GATE-TEST-C [RH6]
192.000.002.rrr-192.000.255.rrr Unassigned [JBP]
R 192.001.000.rrr-192.001.008.rrr BBN local networks [SGC]
R 192.001.009.rrr BBN-ENET3 BBN-ENET3 [SGC]
R 192.001.010.rrr BBN-NETR BBN-NETR [SGC]
R 192.001.011.rrr BBN-SPC-ENET BBN-SPC-ENET [SGC]
R 192.001.012.rrr-192.003.255.rrr BBN local networks [SGC]
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