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-