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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, or 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 [25,26,RK1] R 192.005.034.rrr CISLTESTNET4 Honeywell [25,26,RK1] R 192.005.035.rrr RIACS USRA [61,RLB1] R 192.005.036.rrr CORNELL-CS CORNELL CS Research [61,DK2] R 192.005.037.rrr UR-CS-NET U of R CS 3Mb Net [31,LB1] R 192.005.038.rrr SRI-C3ETHER SRI-AITAD C3ETHERNET [61,BG5] R 192.005.039.rrr UDEL-EECIS Udel EECIS LAN [58,CC2] R 192.005.040.rrr PUCC-NET-A PURDUE Comp Cntr Net [JXS] Reynolds & Postel [Page 6]
Assigned Numbers RFC 870 Network Numbers D 192.005.041.rrr WISLAN WIS Research LAN [54,JRM1] D 192.005.042.rrr AFDSC-HYPER AFDSC Hypernet [MCSJ] R 192.005.043.rrr CUCSNET Columbia CS Net [61,LH2] 192.005.044.rrr-192.005.255.rrr Unassigned [JBP] C*192.006.000.rrr-192.006.255.rrr Hewlett Packard [AXG] C*192.007.000.rrr-192.007.255.rrr Computer Consoles, Inc. [RA11] C*192.008.000.rrr-192.008.255.rrr Spartacus Computers, Inc. [SXM] 192.009.000.rrr-223.255.254.rrr Unassigned [JBP] 223.255.255.rrr Reserved [JBP] Other Reserved Internet Addresses * Internet Address Name Network References - ---------------- ---- ------- ---------- Reserved [JBP] Reynolds & Postel [Page 7]
Assigned Numbers RFC 870 Network Numbers Network Totals Assigned for the Internet Class A B C Total Research 10 27 1055 1092 Defense 2 10 9 21 Commercial 2 0 2 4 Total 14 37 1066 1117 Allocated for Internet and Other Uses Class A B C Total Research 10 27 1055 1092 Defense 2 10 9 21 Commercial 2 0 770 772 Total 14 37 1834 1885 Maximum Allowed Class A B C Total Research 8 1024 65536 66568 Defense 24 3072 458752 461848 Commercial 94 12286 1572862 1585242 Total 126 16382 2097150 2113658 Reynolds & Postel [Page 8]
Assigned Numbers RFC 870 Internet Version Numbers ASSIGNED INTERNET VERSION NUMBERS In the Internet Protocol (IP) [16,47] there is a field to identify the version of the internetwork general protocol. This field is 4 bits in size. Assigned Internet Version Numbers Decimal Octal Version References ------- ----- ------- ---------- 0 0 Reserved [JBP] 1-3 1-3 Unassigned [JBP] 4 4 Internet Protocol [16,47,JBP] 5 5 ST Datagram Mode [18,JWF] 6-14 6-16 Unassigned [JBP] 15 17 Reserved [JBP] ASSIGNED INTERNET PROTOCOL NUMBERS In the Internet Protocol (IP) [16,47] there is a field, called Protocol, to identify the the next level protocol. This is an 8 bit field. Assigned Internet Protocol Numbers Decimal Octal Protocol References ------- ----- ---------------- ---------- 0 0 Reserved [JBP] 1 1 ICMP [16,40,JBP] 2 2 Unassigned [JBP] 3 3 Gateway-to-Gateway [24,MB] 4 4 Unassigned [JBP] 5 5 Stream (ST) [18,JWF] 6 6 Transmission Control (TCP) [16,48,JBP] 7 7 UCL [PK] 8 10 Exterior Gateway Protocol (EGP) [53,RH6] 9 11 Unassigned [JBP] 10 12 BBN RCC Monitoring [SGC] 11 13 NVP [12,SC3] 12 14 PUP [6,EAT3] 13-14 15-16 Unassigned [JBP] 15 17 Cross Net Debugger (XNET) [23,JFH2] 16 20 Chaos Stream [NC3] 17 21 User Datagram (UDP) [16,46,JBP] 18 22 Multiplexing [13,JBP] 19 23 DCN Measurement Subsystems [DLM1] 20 24 Host Monitoring (HMP) [28,RH6] 21 25 Packet Radio Measurement [ZSU] Reynolds & Postel [Page 9]
Assigned Numbers RFC 870 Internet Protocol Numbers 22 26 XEROX NS IDP [62,LLG] 23 27 Trunk-1 [BML] 24 30 Trunk-2 [BML] 25 31 Leaf-1 [BML] 26 32 Leaf-2 [BML] 27-60 33-74 Unassigned [JBP] 61 75 any host internal protocol [JBP] 62 76 CFTP [19,HCF2] 63 77 any local network [JBP] 64 100 SATNET and Backroom EXPAK [DM11] 65 101 MIT Subnet Support [NC3] 66 102 MIT VAX Remote Disk Protocol [MBG] 67 103 Internet Pluribus Packet Core [DM11] 68 104 Unassigned [JBP] 69 105 SATNET Monitoring [DM11] 70 106 Unassigned [JBP] 71 107 Internet Packet Core Utility [DM11] 72-75 110-113 Unassigned [JBP] 76 114 Backroom SATNET Monitoring [DM11] 77 115 Unassigned [JBP] 78 116 WIDEBAND Monitoring [DM11] 79 117 WIDEBAND EXPAK [DM11] 80-254 120-376 Unassigned [JBP] 255 377 Reserved [JBP] Reynolds & Postel [Page 10]
Assigned Numbers RFC 870 Port Numbers ASSIGNED PORT NUMBERS Ports are used in the TCP [16,48] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [16,46]. The assigned ports use a small portion of the possible port numbers. The assigned ports have all except the low order eight bits cleared to zero. The low order eight bits are specified here. Port Assignments: Decimal Octal Description References ------- ----- ----------- ---------- 0 0 Reserved [JBP] 1-4 1-4 Unassigned [JBP] 5 5 Remote Job Entry [8,17,JBP] 7 7 Echo [38,JBP] 9 11 Discard [37,JBP] 11 13 Active Users [34,JBP] 13 15 Daytime [36,JBP] 15 17 Who is up or NETSTAT [JBP] 17 21 Quote of the Day [43,JBP] 19 23 Character Generator [35,JBP] 20 24 File Transfer (Default Data) [16,39,JBP] 21 25 File Transfer (Control) [16,39,JBP] 23 27 Telnet [50,JBP] 25 31 SMTP [16,45,JBP] 27 33 NSW User System FE [14,RHT] 29 35 MSG ICP [32,RHT] 31 37 MSG Authentication [32,RHT] 33 41 Unassigned [JBP] 35 43 Any Printer Server [JBP] 37 45 Time [49,JBP] 39 47 Unassigned [JBP] 41 51 Graphics [17,57,JBP] 42 52 Host Name Server [16,42,JBP] 43 53 NICNAME (WhoIs) [16,22,JAKE] 44 54 MPM FLAGS Protocol [JBP] 45 55 Message Processing Module (receive) [41,JBP] 46 56 MPM (default send) [41,JBP] 47 57 NI FTP [59,SK] Reynolds & Postel [Page 11]
Assigned Numbers RFC 870 Port Numbers 49 61 Login Host Protocol [PXD] 51 63 IMP Logical Address Maintenance [30,AGM] 53 65 Domain Name Server [PM1] 55 67 ISI Graphics Language [5,RB6] 57 71 Any Private Terminal Access [JBP] 59 73 Any Private File Service [JBP] 61 75 NIMAIL [3,SK] 63 77 Unassigned [JBP] 65 101 Unassigned [JBP] 67 103 Datacomputer at CCA [10,JZS] 69 105 Trivial File Transfer [16,55,KRS] 71 107 NETRJS [7,17,RTB] 72 110 NETRJS [7,17,RTB] 73 111 NETRJS [7,17,RTB] 74 112 NETRJS [7,17,RTB] 75 113 Any Private Dial Out Service [JBP] 77 115 Any Private RJE Service [JBP] 79 117 Finger (Name) [17,20,KLH] 81 121 HOSTS2 Name Server [EAK1] 83 123 MIT ML Device [DPR] 85 125 MIT ML Device [DPR] 87 127 any terminal link [JBP] 89 131 SU/MIT Telnet Gateway [MRC] 91 133 MIT Dover Spooler [EBM] 93 135 Device Control Protocol [DCT] 95 137 SUPDUP [15,MRC] 97 141 Datacomputer Status [10,JZS] 99 143 Metagram Relay [GEOF] 101 145 NIC Host Name Server [16,21,JAKE] 103 147 Unassigned [JBP] 105 151 CSNET Mailbox Name Server (Program) [56,MHS1] 107 153 Remote Telnet Service [44,JBP] 109-129 155-201 Unassigned [JBP] 131 203 Datacomputer [10,JZS] 132-223 204-337 Reserved [JBP] 224-241 340-361 Unassigned [JBP] 243 363 Survey Measurement [4,AV] 245 365 LINK [9,RDB2] 247-255 367-377 Unassigned [JBP] Reynolds & Postel [Page 12]
Assigned Numbers RFC 870 Autonomous System Numbers ASSIGNED AUTONOMOUS SYSTEM NUMBERS The Exterior Gateway Protocol (EGP) [53] specifies that groups of gateways may form autonomous systems. The EGP provides a 16-bit field for identifying such systems. The values of this field are registered here. Autonomous System Numbers: Decimal Description References ------- ----------- ---------- 0 Reserved [JBP] 1 The BBN Gateways [MB] 2 The DCN Gateways [DLM1] 3 The MIT Gateways [LM8] 4-65534 Unassigned [JBP] 65535 Reserved [JBP] Reynolds & Postel [Page 13]
Assigned Numbers RFC 870 ARPANET Link Numbers ASSIGNED ARPANET 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. Later specifications defined this field as the "Message-ID" with a length of 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 explicitly 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 Reserved [JBP] 1-149 1-225 Unassigned [JBP] 150 226 Xerox NS IP [62,LLG] 151 227 Unassigned [JBP] 152 230 PARC Universal Protocol [6,EAT3] 153 231 TIP Status Reporting [JGH] 154 232 TIP Accounting [JGH] 155 233 Internet Protocol (regular) [16,47,JBP] 156-158 234-236 Internet Protocol (experimental) [16,47,JBP] 159-195 237-303 Unassigned [JBP] 196-255 304-377 Experimental Protocols [JBP] 248-255 370-377 Network Maintenance [JGH] ETHERNET NUMBERS OF INTEREST Many of the networks of all classes are Ethernets (10Mb) or Experimental Ethernets (3Mb). These systems use a message "type" field in much the same way the ARPANET uses the "link" field. Assignments: Ethernet Exp. Ethernet Description References -------------- -------------- ----------- ---------- decimal Hex decimal octal 512 02,00 512 1000 XEROX PUP [6,EAT3] 1536 06,00 1536 3000 XEROX NS IDP [62,LLG] 2048 08,00 513 1001 DOD IP [16,47,JBP] 2054 08,06 - - Address Res [33,DCP1] Reynolds & Postel [Page 14]
Assigned Numbers RFC 870 Public Data Network Numbers ASSIGNED PUBLIC DATA NETWORK NUMBERS One of the Internet Class A Networks is the international system of Public Data Networks. This section lists the mapping between the Internet Addresses and the Public Data Network Addresses (X.121). Assignments: Internet Public Data Net Description References --------------- ----------------- ----------- ---------- Reserved [JBP] 3110-317-00035 00 PURDUE-TN [CAK] 3110-608-00027 00 UWISC-TN [CAK] 3110-302-00024 00 UDEL-TN [CAK] 2342-192-00149 23 UCL-VTEST [PK] 2342-192-00300 23 UCL-TG [PK] 2342-192-00300 25 UK-SATNET [PK] 3110-608-00024 00 UWISC-IBM [MHS1] 3110-213-00045 00 RAND-TN [MO2] 2342-192-00300 23 UCL-CS [PK] 3110-617-00025 00 BBN-VAN-GW [JD21] Unassigned [JBP] Reserved [JBP] The standard for transmission of IP datagrams over the Public Data Network is specified in [27]. Reynolds & Postel [Page 15]
Assigned Numbers RFC 870 Documents DOCUMENTS --------- [1] Aerospace, Internal Report, ATM-83(3920-01)-3, 1982. [2] BBN, "Specifications for the Interconnection of a Host and an IMP", Report 1822, Bolt Beranek and Newman, Cambridge, Massachusetts, revised, December 1981. [3] Bennett, C., "A Simple NIFTP-Based Mail System", IEN 169, University College, London, January 1981. [4] Bhushan, A., "A Report on the Survey Project", RFC 530, NIC 17375, 22 June 1973. [5] Bisbey, R., D. Hollingworth, and B. Britt, "Graphics Language (version 2.1)", ISI/TM-80-18, USC/Information Sciences Institute, July 1980. [6] Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An Internetwork Architecture", XEROX Palo Alto Research Center, CSL-79-10, July 1979; also in IEEE Transactions on Communication, Volume COM-28, Number 4, April 1980. [7] Braden, R., "NETRJS Protocol", RFC 740, NIC 42423, 22 November 1977. Also in [17]. [8] Bressler, B., "Remote Job Entry Protocol", RFC 407, NIC 12112, 16 October 72. Also in [17]. [9] Bressler, R., "Inter-Entity Communication -- An Experiment", RFC 441, NIC 13773, 19 January 1973. [10] CCA, "Datacomputer Version 5/4 User Manual", Computer Corporation of America, August 1979. [11] Clark, D., "Revision of DSP Specification", Local Network Note 9, Laboratory for Computer Science, MIT, 17 June 1977. [12] Cohen, D., "Specifications for the Network Voice Protocol", RFC 741, ISI/RR 7539, USC/Information Sciences Institute, March 1976. [13] Cohen, D. and J. Postel, "Multiplexing Protocol", IEN 90, USC/Information Sciences Institute, May 1979. Reynolds & Postel [Page 16]
Assigned Numbers RFC 870 Documents [14] 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. [15] Crispin, M., "SUPDUP Protocol", RFC 734, NIC 41953, 7 October 1977. Also in [17]. [16] Feinler, E., "Internet Protocol Transition Workbook", Network Information Center, SRI International, March 1982. [17] 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. [18] Forgie, J., "ST - A Proposed Internet Stream Protocol", IEN 119, M.I.T. Lincoln Laboratory, September 1979. [19] Forsdick, H., "CFTP", Network Message, Bolt Berenak and Newman, January 1982. [20] Harrenstien, K., "Name/Finger", RFC 742, NIC 42758, 30 December 1977. Also in [17]. [21] Harrenstien, K., V. White, and E. Feinler, "Hostnames Server", RFC 811, SRI International, March 1982. [22] Harrenstien, K., and V. White, "Nicname/Whois", RFC 812, SRI International, March 1982. [23] Haverty, J., "XNET Formats for Internet Protocol Version 4", IEN 158, October 1980. [24] Hinden, R., A. Sheltzer, "The DARPA Internet Gateway", RFC 823, September 1982. [25] Honeywell CISL, Internal Document, "AFSDSC Hyperchannel RPQ Project Plan". [26] Honeywell CISL, Internal Document, "Multics MR11 PFS". [27] Korb, John T., "A Standard for the Transmission of IP Datagrams Over Public Data Networks", RFC 877, Purdue University, September 1983. Reynolds & Postel [Page 17]
Assigned Numbers RFC 870 Documents [28] Littauer, B., "A Host Monitoring Protocol", IEN 197, Bolt Berenak and Newman, September 1981. [29] Macgregor, W., and D. Tappan, "The CRONUS Virtual Local Network", RFC 824, Bolt Beranek and Newman, 22 August 1982. [30] Malis, A., "Logical Addressing Implementation Specification", BBN Report 5256, pp 31-36, May 1983. [31] Metcalfe, R.M. and D.R. Boggs, "Ethernet: Distributed Packet Switching for Local Computer Networks", Communications of the ACM, 19 (7), pp 395-402, July 1976. [32] 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. [33] Plummer, D., "An Ethernet Address Resolution Protocol or Converting Network Protocol Addresses to 48-bit Ethernet Addresses for Transmission on Ethernet Hardware", RFC 826, MIT LCS, November 1982. [34] Postel, J., "Active Users", RFC 866, USC/Information Sciences Institute, May 1983. [35] Postel, J., "Character Generator Protocol", RFC 864, USC/Information Sciences Institute, May 1983. [36] Postel, J., "Daytime Protocol", RFC 867, USC/Information Sciences Institute, May 1983. [37] Postel, J., "Discard Protocol", RFC 863, USC/Information Sciences Institute, May 1983. [38] Postel, J., "Echo Protocol", RFC 862, USC/Information Sciences Institute, May 1983. [39] Postel, J., "File Transfer Protocol", RFC 765, IEN 149, USC/Information Sciences Institute, June 1980. [40] Postel, J., "Internet Control Message Protocol - DARPA Internet Program Protocol Specification", RFC 792, USC/Information Sciences Institute, September 1981. [41] Postel, J., "Internet Message Protocol", RFC 759, IEN 113, USC/Information Sciences Institute, August 1980. Reynolds & Postel [Page 18]
Assigned Numbers RFC 870 Documents [42] Postel, J., "Name Server", IEN 116, USC/Information Sciences Institute, August 1979. [43] Postel, J., "Quote of the Day Protocol", RFC 865, USC/Information Sciences Institute, May 1983. [44] Postel, J., "Remote Telnet Service", RFC 818, USC/Information Sciences Institute, November 1982. [45] Postel, J., "Simple Mail Transfer Protocol", RFC 821, USC/Information Sciences Institute, August 1982. [46] Postel, J., "User Datagram Protocol", RFC 768 USC/Information Sciences Institute, August 1980. [47] Postel, J., ed., "Internet Protocol - DARPA Internet Program Protocol Specification", RFC 791, USC/Information Sciences Institute, September 1981. [48] Postel, J., ed., "Transmission Control Protocol - DARPA Internet Program Protocol Specification", RFC 793, USC/Information Sciences Institute, September 1981. [49] Postel, J., and K. Harrenstien, "Time Protocol", RFC 868, USC/Information Sciences Institute, May 1983. [50] Postel, J., and J. Reynolds, "Telnet Protocol Specification", RFC 854, USC/Information Sciences Institute, May 1983. [51] Reed, D., "Protocols for the LCS Network", Local Network Note 3, Laboratory for Computer Science, MIT, 29 November 1976. [52] Reynolds, J. and J. Postel, "Official Protocols", RFC 880, USC/Information Sciences Institute, October 1983. [53] Rosen, E., "Exterior Gateway Protocol" RFC 827, Bolt Berenak and Newman, October 1982. [54] Skelton, A., S. Holmgren, and D. Wood, "The MITRE Cablenet Project", IEN 96, April 1979. [55] Sollins, K., "The TFTP Protocol (Revision 2)", RFC 783, MIT/LCS, June 1981. [56] Solomon, M., L. Landweber, and D, Neuhengen, "The CSNET Name Server", Computer Networks, v.6, n.3, pp. 161-172, July 1982. Reynolds & Postel [Page 19]
Assigned Numbers RFC 870 Documents [57] Sproull, R., and E. Thomas, "A Networks Graphics Protocol", NIC 24308, 16 August 1974. Also in [17]. [58] "The Ethernet - A Local Area Network", Version 1.0, Digital Equipment Corporation, Intel Corporation, Xerox Corporation, September 1980. [59] The High Level Protocol Group, "A Network Independent File Transfer Protocol", INWG Protocol Note 86, December 1977. [60] Whelan, D., "The Caltech Computer Science Department Network", 5052:DF:82, Caltech Computer Science Department, 1982. [61] XEROX, "The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specification", X3T51/80-50, Xerox Corporation, Stamford, CT., October 1980. [62] XEROX, "Internet Transport Protocols", XSIS 028112, Xerox Corporation, Stamford, Connecticut, December 1981. Reynolds & Postel [Page 20]
Assigned Numbers RFC 870 People PEOPLE ------ [AGM] Andy Malis BBN Malis@BBN-UNIX [APS] Anita Skelton MITRE skelton@MITRE [AP] Alan Parker NRL parker@NRL-CSS [AV] Al Vezza MIT AV@MIT-XX [AXG] Atul Garg HP ---none--- [BG5] Bob Gilligan SRI Gilligan@SRI-KL [BML] Barry Leiner ARPA Leiner@USC-ISIA [BXA] Bobby W. Allen YPG WYMER@OFFICE [CAK] Chris Kent PURDUE cak@PURDUE [CC2] Chase Cotton UDEL Cotton@Udel-EE [CJW2] Cliff Weinstein LL cjw@LL-11 [CLH3] Charles Hedrick RUTGERS Hedrick@RUTGERS [CMR] Craig Rogers ISI Rogers@USC-ISIB [DAM1] David A. Mosher UCB Mosher@BERKELEY [DCP1] David Plummer MIT DCP@MIT-MC [DCT] Dan Tappan BBN Tappan@BBNG [DDC2] Dave Clark MIT-LCS Clark@MIT-Multics [DHH] Doug Hunt BBN DHunt@BBN-Unix [DK2] Dean B. Krafft CORNELL Dean@CORNELL [DLM1] David Mills LINKABIT Mills@USC-ISID [DM11] Dale McNeill BBN mcneill@BBN-Unix [DPR] David Reed MIT-LCS DPR@MIT-XX [DSW] Dan Whelan Caltech Dan@CIT-20 [EAK1] Earl Killian LLL EAK@MIT-MC [EAT3] Ed Taft XEROX Taft.PA@PARC-MAXC [EBM] Eliot Moss MIT EBM@MIT-XX [EC5] Ed Cain DCEC cain@EDN-Unix [EF5] Ed Franceschini NYU Franceschini@NYU [EHP] Ed Perry SRI Perry@SRI-KL [FAS] Fred Segovich Compion fred@COMPION-VMS [GEOF] Geoff Goodfellow SRI Geoff@DARCOM-KA [HCF2] Harry Forsdick BBN Forsdick@BBNG [HDC1] Horst Clausen DFVLR Clausen@USC-ISID [HDW2] Howard Wactlar CMU Wactlar@CMU-10B [HH6] Heidi Heiden DCA Heiden@BBNC [HM] Hank Magnuski --- JOSE@PARC-MAXC [JAKE] Jake Feinler SRI Feinler@SRI-KL [JAR4] Jim Rees WASHINGTON JIM@WASHINGTON [JAW3] Jil Westcott BBN Westcott@BBNF [JBP] Jon Postel ISI Postel@USC-ISIF [JC11] Jim Clifford LANL jrc@LANL [JCM] Jeff Mogul STANFORD Mogul@SU-SCORE [JD21] Jonathan Dreyer BBN JDreyer@BBN-Unix [JDG] Jim Guyton RAND guyton@RAND-Unix [JEM] Jim Mathis SRI Mathis@SRI-KL [JFH2] Jack Haverty BBN Haverty@BBN-Unix Reynolds & Postel [Page 21]
Assigned Numbers RFC 870 People [JGH] Jim Herman BBN Herman@BBN-Unix [JO5] John O'Donnell YALE ODonnell@YALE [JRM1] John Mullen MITRE Mullen@MITRE [JSG5] Jon Goodridge BBN jsg@BBN-UNIX [JWF] Jim Forgie LL Forgie@BBNC [JXS] Jeffrey R. Schwab PURDUE jrs@PURDUE [JZS] Joanne Sattely CCA JZS@CCA [KLH] Ken Harrenstien SRI KLH@NIC [KRS] Karen Sollins MIT Sollins@MIT-XX [LB1] Liudvikas Bukys ROCHESTER Bukys@ROCHESTER [LCN] Lou Nelson AEROSPACE Lou@AEROSPACE [LCS] Lou Schreier SRI Schreier@USC-ISID [LH2] Lincoln Hu COLUMBIA Hu@Columbia-20 [LLG] Larry Garlick XEROX Garlick@PARC-MAXC [LM8] Liza Martin MIT-LCS Martin@MIT-XX [MBG] Michael Greenwald MIT-LCS Greenwald@MIT-Multics [MB] Michael Brescia BBN Brescia@BBN-Unix [MCSJ] Mike StJohns AFDSC StJohns@MIT-MULTICS [MH12] Mark Horton ATT mark@BERKELEY [MHS1] Marvin Solomon WISC Solomon@UWISC [MJM2] Mike Muuss BRL Mike@BRL [MO2] Michael O'Brien RAND OBrien@RAND-Unix [MRC] Mark Crispin Stanford Admin.MRC@SU-SCORE [MXB] Mark Brown USC Mark@USC-ECLB [MXR] Marshall Rose Irvine MRose.UCI@RAND-Relay [NC3] J. Noel Chiappa MIT JNC@MIT-XX [NM] Neil MacKenzie RSRE T45@USC-ISID [NXK] Neil Katin HP hpda.neil@BERKELEY [PK] Peter Kirstein UCL Kirstein@USC-ISIA [PM1] Paul Mockapetris ISI Mockapetris@USC-ISIF [PS3] Paal Spilling NDRE Paal@DARCOM-KA [PXD] Pieter Ditmars BBN pditmars@BBN-UNIX [PXN] Peter Nellessen SIEMENS crtvax!pn@CMU-CS-SPICE [RA11] Rick Adams CCI rlgvax!ra@SEISMO [RB6] Richard Bisbey ISI Bisbey@USC-ISIB [RDB2] Robert Bressler BBN Bressler@BBN-Unix [REK2] Robert Kahn ARPA Kahn@USC-ISIA [RF1] Randy Frank UTAH Frank@UTAH-20 [RH6] Robert Hinden BBN Hinden@BBN-Unix [RHT] Robert Thomas BBN BThomas@BBNG [RK1] Richard Kovalcik Honeywell Kovalcik@MIT-MULTICS [RLB1] Bob Brown USRA rlb@ames-vmsb [RLH2] Ronald L. Hartung NSWC ron@nswc-wo [RR2] Raleigh Romine Teledyne romine@SEISMO [RS23] Russel Sandberg WISC root@UWISC [RTB] Bob Braden UCLA Braden@USC-ISIA [SC3] Steve Casner ISI Casner@USC-ISIB [SGC] Steve Chipman BBN Chipman@BBNA Reynolds & Postel [Page 22]
Assigned Numbers RFC 870 People [SK] Steve Kille UCL UKSAT@USC-ISID [SXM] Scott Marcus Spartacus ---none--- [TC4] Tony Cincotta DTNSRDC tony@NALCON [WIM] William Macgregor BBN macg@BBN [ZSU] Zaw-Sing Su SRI ZSu@SRI-TSC Reynolds & Postel [Page 23]
Assigned Numbers RFC 870 APPENDIX A APPENDIX A ---------- This appendix summarizes the agreements reached by the DDN/PMO and DARPA at a September 1982 meeting concerning the allocation and assignment of the various numbers associated with DoD Protocol Standards and the DARPA Experimental Standards. Recommended policy is summarized for each type of number assignment of concern: Network Identifiers used by the Internet Protocol It is recommended that the available number spaces for class A, B, and C network addresses be allocated among R&D, DoD and commercial uses, and that assignments of these addresses be the responsibility respectively of DARPA, DCA PCCO/DDN and the National Bureau of Standards. The recommended allocations are given below. Class A (highest-order bit 0) R&D allocation: 8 nets DoD allocation: 24 nets Commercial allocation: 94 nets Reserved Addresses: 0,127 Class B (highest-order bits 1-0) R&D allocation: 1024 nets DoD allocation: 3072 nets Commercial allocation: 12286 nets Reserved Addresses: 0,16383 Class C (highest-order bits 1-1-0) R&D allocation: 65536 nets DoD allocation: 458725 nets Commercial allocation: 1572862 nets Reserved Addresses: 0,2097151 Class D (highest-order bits 1-1-1) All addresses in this class are reserved for future use, possibly in support of multicast services. They should be allocated to R&D use for the present. Reynolds & Postel [Page 24]
Assigned Numbers RFC 870 APPENDIX A Within the R&D community, it will be the policy that network identifiers will only be granted to applicants who show evidence that they are acquiring standard Bolt Beranek and Newman gateway software or have implemented or are acquiring a gateway meeting the Exterior Gateway Protocol requirements. Acquisition of the Berkeley BSD 4.2 UNIX software might be considered evidence of the latter. Experimental networks which later become operational need not be renumbered. Rather, the identifiers could be moved from R&D to DoD or Commercial status. Thus, network identifiers may change state among R&D, DoD and commercial, but the number of identifiers allocated to each use should remain within the limits indicated above. To make possible this fluid assignment, it is recommended that the network identifier spaces not be allocated by simple partition but rather by specific assignment. Protocol Identifiers In general, all assignments will be made by the R&D community, but any numbers which become R&D, DoD, national or international standards will be marked as such in this RFC. Protocol identifiers 0 and 255 are reserved. 95 protocol identifiers are allocated for assignment to DoD standards, 32 for R&D use, and 127 for Commercial, national or international standards. Port Numbers A recommendation for allocation and assignment of port numbers is to be developed jointly by representatives of the ICCB and PSTP. ARPANET Link Numbers All unnecessary link number usage will be eliminated by joint effort of the ICCB, PSTP and BBN. BBN will give consideration to the use of link numbers to promote interoperability among various ARPANET interfaces and report to the ICCB, PSTP and DDN/PMO. Examples of possible interoperability issues are: (i) interoperability of 1822 and X.25 interfaces (ii) interoperability of SIP and other interfaces (iii) logical addressing or other special services Reynolds & Postel [Page 25]
Assigned Numbers RFC 870 APPENDIX A IP Version Numbers These numbers will be assigned only by the R&D community for the purpose of exploring alternatives in internet protocol service expansion, such as inclusion of stream protocol (ST) services. TCP, IP and Telnet Option Identifiers These numbers will be assigned by the R&D community. Any permanent or experimental assignments will be identified in the documents specifying those protcols. Implementation: This policy recommendation has not been fully implemented as yet. Currently, Joyce Reynolds is acting coordinator for all number assignments. Reynolds & Postel [Page 26]