Network Working Group J. Reynolds
Request for Comments: 870 J. Postel
ISI
Obsoletes RFCs: 820, October 1983
790, 776, 770, 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 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, or network number please contact Joyce to receive a number
assignment.
Joyce Reynolds
USC - Information Sciences Institute
4676 Admiralty Way
Marina del Rey, California 90292
phone: (213) 822-1511
ARPA mail: JKREYNOLDS@USC-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
"Internet Protocol Transition Workbook" [16] or in the old "ARPANET
Protocol Handbook" [17] prepared by the NIC. Some of the items listed
are undocumented. Further information on protocols can be found in the
memo "Official Protocols" [52].
In all cases the name and mailbox of the responsible individual is
indicated. In the lists that follow, a bracketed entry, e.g., [16,iii],
at the right hand margin of the page indicates a reference for the
listed protocol, where the number cites the document and the "iii" cites
the person.
Reynolds & Postel [Page 1]
Assigned Numbers RFC 870
Network Numbers
ASSIGNED NETWORK NUMBERS
The network numbers listed here are used as internet addresses by the
Internet Protocol (IP) [16,47]. 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 870
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 ISIF 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 three catagories of users of Internet Addresses: Research,
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 (in the column marked by an asterisk):
R for Research and Development, D for DoD, and C for Commercial.
Numbers assigned for commercial use of IP family protocols, but not
for interworking with the ARPA or DoD Internets are marked with an
astrisk preceeding the number.
For various reasons, the assigned numbers of networks are sometimes
changed. To ease the transition the old number will be listed as
well. These "old number" entries will be marked with a "T" following
the number and preceeding the name, and the network name will be the
suffixed "-TEMP".
Reynolds & Postel [Page 3]
Assigned Numbers RFC 870
Network Numbers
Assigned Network Numbers
Class A Networks
* Internet Address Name Network References
- ---------------- ---- ------- ----------
000.rrr.rrr.rrr Reserved [JBP]
R 003.rrr.rrr.rrr T RCC-NET-TEMP BBN RCC Network [SGC]
R 004.rrr.rrr.rrr SATNET Atlantic Satellite Network[DM11]
D 005.rrr.rrr.rrr T DEMO-PR-1-TEMPDemo-1 Packet Radio Network[LCS]
D 006.rrr.rrr.rrr T YPG-NET-TEMP Yuma Proving Grounds [2,BXA]
D 007.rrr.rrr.rrr T EDN-TEMP DCEC EDN [EC5]
R 008.rrr.rrr.rrr T BBN-NET-TEMP BBN Network [JSG5]
D 009.rrr.rrr.rrr T BRAGG-PR-TEMP Ft. Bragg Packet Radio Net [JEM]
R 010.rrr.rrr.rrr ARPANET ARPANET [2,17,REK2]
C 012.rrr.rrr.rrr ATT ATT, Bell Labs [MH12]
C 014.rrr.rrr.rrr PDN Public Data Network [REK2]
R 018.rrr.rrr.rrr T MIT-TEMP MIT Network [11,51,DDC2]
R 023.rrr.rrr.rrr MITRE MITRE Cablenet [54,APS]
D 024.rrr.rrr.rrr MINET MINET [2,DHH]
R 025.rrr.rrr.rrr RSRE-EXP RSRE Experimental [NM]
D 026.rrr.rrr.rrr MILNET MILNET [HH6]
R 027.rrr.rrr.rrr T NOSC-LCCN-TEMPNOSC / LCCN [RH6]
R 028.rrr.rrr.rrr WIDEBAND Wide Band Satellite Net [CJW2]
R 032.rrr.rrr.rrr UCL-TAC UCL TAC [PK]
R 035.rrr.rrr.rrr T RSRE-NULL-TEMPRSRE Null Network [NM]
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]
R 045.rrr.rrr.rrr T C3-PR-TEMP Testbed Development PRNET [BG5]
R 046.rrr.rrr.rrr T Berkeley-TEMP Berkeley Ethernet [DAM1]
R 047.rrr.rrr.rrr T SAC-PR-TEMP SAC Packet Radio Network [BG5]
R 048.rrr.rrr.rrr NDRE-TIU NDRE-TIU [PS3]
R 050.rrr.rrr.rrr NTA-RING NDRE-RING [PS3]
001.rrr.rrr.rrr-002.rrr.rrr.rrr Unassigned [JBP]
011.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-022.rrr.rrr.rrr Unassigned [JBP]
029.rrr.rrr.rrr-031.rrr.rrr.rrr Unassigned [JBP]
033.rrr.rrr.rrr-034.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]
049.rrr.rrr.rrr Unassigned [JBP]
051.rrr.rrr.rrr-126.rrr.rrr.rrr Unassigned [JBP]
127.rrr.rrr.rrr Reserved [JBP]
Reynolds & Postel [Page 4]
Assigned Numbers RFC 870
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 [MO1]<--***
R 128.004.rrr.rrr DCNET LINKABIT DCNET [DLM1]
R 128.005.rrr.rrr FORDNET FORD DCNET [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 [DLM1]
R 128.009.rrr.rrr ISI-NET USC-ISI Local Network [CMR]
R 128.010.rrr.rrr PURDUE-CS Purdue Computer Science [CAK]
R 128.011.rrr.rrr BBN-CRONUS BBN DOS Project [29,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 [2,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]
128.029.rrr.rrr Unassigned [JBP]
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 [25,26,RK1]
R 128.036.rrr.rrr YALE-NET YALE NET [61,JO5]
D 128.037.rrr.rrr YPG-NET Yuma Proving Grounds [2,BXA]
D 128.038.rrr.rrr NSWC-NET NSWC Local Host Net [RLH2]
128.039.rrr.rrr-191.254.rrr.rrr Unassigned [JBP]
191.255.rrr.rrr Reserved [JBP]
Reynolds & Postel [Page 5]
Assigned Numbers RFC 870
Network Numbers
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-192.004.255.rrr BBN local networks [SGC]
R 192.005.001.rrr CISLHYPERNET Honeywell [RK1]
R 192.005.002.rrr WISC Univ of Wisconsin Madison [RS23]
C 192.005.003.rrr HP-DESIGN-AIDS HP Design Aids [NXK]
C 192.005.004.rrr HP-TCG-UNIX Hewlett Packard TCG Unix [NXK]
192.005.005.rrr Unassigned [JBP]
192.005.006.rrr Unassigned [JBP]
R 192.005.007.rrr CIT-CS-NET Caltech-CS-Net [60,DSW]
R 192.005.008.rrr WASHINGTON University of Washington [JAR4]
R 192.005.009.rrr AERONET Aerospace Labnet [1,LCN]
R 192.005.010.rrr ECLNET USC-ECL-CAMPUS-NET [MXB]
R 192.005.011.rrr CSS-RING SEISMIC-RESEARCH-NET [RR2]
R 192.005.012.rrr UTAH-NET UTAH-COMPUTER-SCIENCE-NET [RF1]
R 192.005.013.rrr CCNET Compion Network [61,FAS]
R 192.005.014.rrr RAND-NET RAND Network [61,JDG]
R 192.005.015.rrr NYU-NET NYU Network [EF5]
R 192.005.016.rrr LANL-LAND Los Alamos Dev LAN [61,JC11]
R 192.005.017.rrr NRL-NET Naval Research Lab [AP]
R 192.005.018.rrr IPTO-NET ARPA-IPTO Office Net [REK2]
R 192.005.019.rrr UCIICS UCI-ICS Res Net [MXR]
R 192.005.020.rrr CISLTTYNET Honeywell [RK1]
D 192.005.021.rrr BRLNET1 BRLNET1 [2,MJM2]
D 192.005.022.rrr BRLNET2 BRLNET2 [2,MJM2]
D 192.005.023.rrr BRLNET3 BRLNET3 [2,MJM2]
D 192.005.024.rrr BRLNET4 BRLNET4 [2,MJM2]
D 192.005.025.rrr BRLNET5 BRLNET5 [2,MJM2]
D 192.005.026.rrr NSRDCOA-NET NSRDC Office Auto Net [TC4]
D 192.005.027.rrr DTNSRDC-NET DTNSRDC-NET [TC4]
R 192.005.028.rrr RSRE-NULL RSRE-NULL [NM]
R 192.005.029.rrr RSRE-ACC RSRE-ACC [NM]
R 192.005.030.rrr RSRE-PR RSRE-PR [NM]
R 192.005.031.rrr SIEMENS-NET Siemens Research Network [PXN]
R 192.005.032.rrr CISLTESTNET2 Honeywell [25,26,RK1]
R 192.005.033.rrr CISLTESTNET3 Honeywell [