📄 rfc1166.txt
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set to 1-1-1-1. These addresses, called "class E", are reserved. 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 VENERA.ISI.EDU in dotted decimal is 128.009.000.032, or 128.9.0.32. 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 research Internet and operational 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 the Internet. Independent networks should not be listed in the working tables of the Internet hosts or gateways.Kirkpatrick, Stahl & Recker [Page 5]RFC 1166 Internet Numbers July 1990 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. The address zero is to be interpreted as meaning "this", as in "this network". For example, the address 0.0.0.37 could be interpreted as meaning host 37 on 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 interpreted as meaning all hosts on the network 128.9. The class A network number 127 is assigned the "loopback" function, that is, a datagram sent by a higher level protocol to a network 127 address should loop back inside the host. No datagram "sent" to a network 127 address should ever appear on any network anywhere.Kirkpatrick, Stahl & Recker [Page 6]RFC 1166 Internet Numbers July 1990Class A Networks * Internet Address Network Reference - ---------------- ------- ---------- *0.rrr.rrr.rrr Reserved [JBP] 1.rrr.rrr.rrr-2.rrr.rrr.rrr Unassigned [NIC] C*3.rrr.rrr.rrr GE-INTERNET [JEB50] R 4.rrr.rrr.rrr SATNET [SHB] 5.rrr.rrr.rrr Unassigned [NIC] D 6.rrr.rrr.rrr YPG-NET [BWA] D 7.rrr.rrr.rrr EDN-TEMP [EC5] R 8.rrr.rrr.rrr BBNCCNET [SGC] R 9.rrr.rrr.rrr IBM [JP247] R 10.rrr.rrr.rrr ARPANET [JS283] D 11.rrr.rrr.rrr DODIIS [GEG4] C 12.rrr.rrr.rrr ATT [MH82] C 13.rrr.rrr.rrr XEROX-NET [SJ33] C 14.rrr.rrr.rrr PDN [JKR1] R 15.rrr.rrr.rrr HP-INTERNET [WU1] C 16.rrr.rrr.rrr DEC-INTERNET [BKR] 17.rrr.rrr.rrr Unassigned [NIC] R 18.rrr.rrr.rrr MIT-TEMP [JIS] C*19.rrr.rrr.rrr FINET [RJB3] D*20.rrr.rrr.rrr ANALYTICS [BD107] D 21.rrr.rrr.rrr DDN-RVN [MLC] D*22.rrr.rrr.rrr DSNET1 [GEG4] D 23.rrr.rrr.rrr DDN-TC-NET [DH17] 24.rrr.rrr.rrr Unassigned [NIC] R 25.rrr.rrr.rrr RSRE-EXP [DBH11] D 26.rrr.rrr.rrr MILNET [TMH6] R 27.rrr.rrr.rrr NOSC-LCCN-TEMP [RH6] R 28.rrr.rrr.rrr WIDEBAND [CJW2] D 29.rrr.rrr.rrr MILX25-TEMP [TMH6] D 30.rrr.rrr.rrr ARPAX25-TEMP [TMH6] G 31.rrr.rrr.rrr UCDLA-NET [CL64] 32.rrr.rrr.rrr-34.rrr.rrr.rrr Unassigned [NIC] R 35.rrr.rrr.rrr MERIT [HWB] R 36.rrr.rrr.rrr SU-NET-TEMP [VAF] 37.rrr.rrr.rrr-40.rrr.rrr.rrr Unassigned [NIC] R 41.rrr.rrr.rrr BBN-TEST-A [RH6] R 42.rrr.rrr.rrr CAN-INET [MV38] R*43.rrr.rrr.rrr JAPAN-A [JM292] R 44.rrr.rrr.rrr AMPRNET [PK28] 45.rrr.rrr.rrr Reserved [NIC] C 46.rrr.rrr.rrr BBNET [JSG1] R 47.rrr.rrr.rrr BNR [BM178] 48.rrr.rrr.rrr-126.rrr.rrr.rrr Unassigned [NIC] *127.rrr.rrr.rrr Loopback [JBP]Kirkpatrick, Stahl & Recker [Page 7]RFC 1166 Internet Numbers July 1990Class B Networks * Internet Address Network Reference - ---------------- ------- ---------- 128.0.rrr.rrr Reserved [JBP] R 128.1.rrr.rrr BBN-TEST-B [RH6] R 128.2.rrr.rrr CMU-NET [HDW2] R 128.3.rrr.rrr LBL-IP-NET1 [CAL3] R 128.4.rrr.rrr DCNET [DLM1] R 128.5.rrr.rrr FORDNET [FJB3] R 128.6.rrr.rrr RUTGERS [CLH3] R 128.7.rrr.rrr KRAUTNET [GB7] R 128.8.rrr.rrr UMDNET [LAM1] R 128.9.rrr.rrr ISI-NET [VLG] R 128.10.rrr.rrr PURDUE-CS-EN [DT50] R 128.11.rrr.rrr BBN-CRONUS [PK19] R 128.12.rrr.rrr SU-NET [VAF] D 128.13.rrr.rrr MATNET [SHB] R 128.14.rrr.rrr BBN-SAT-TEST [SHB] R 128.15.rrr.rrr S1NET [RAK12] R 128.16.rrr.rrr UCL-CS-ETHER [PK] D 128.17.rrr.rrr MATNET-ALT [SHB] R 128.18.rrr.rrr SRINET [TONY] D 128.19.rrr.rrr EDN [EC5] D 128.20.rrr.rrr BRLNET [TS9] R 128.21.rrr.rrr SRI-PR-1 [PEM4] R 128.22.rrr.rrr SRI-PR-2 [PEM4] R*128.23.rrr.rrr MUSC [SB228] R 128.24.rrr.rrr ROCKWELL-PR [JCJ1] D 128.25.rrr.rrr BRAGG-PR [LDB3] D 128.26.rrr.rrr SAPE-AIRNET [CAD13] D 128.27.rrr.rrr DEMO-PR-1 [DM261] D 128.28.rrr.rrr C3-PR-TEMP [GMR] R 128.29.rrr.rrr MITRE [TML] R 128.30.rrr.rrr MIT-NET [DDC1] R 128.31.rrr.rrr MIT-RES [DDC1] R 128.32.rrr.rrr UCB-ETHER [RWH5] R 128.33.rrr.rrr BBN-NET [SGC] R 128.34.rrr.rrr NOSC-LCCN [RH6] R 128.35.rrr.rrr BULLUSANET [JLM23] R 128.36.rrr.rrr YALE-NET [HML1] D 128.37.rrr.rrr YUMA [RBB2] D 128.38.rrr.rrr NSWC-NET [VHB] R 128.39.rrr.rrr NTANET [PS27] R 128.40.rrr.rrr UCL-ETHERNET [JA168] R 128.41.rrr.rrr UCL-CS-SERVICE [JA168] R 128.42.rrr.rrr RICE-NET [FG50] R 128.43.rrr.rrr DRENET [JS597]Kirkpatrick, Stahl & Recker [Page 8]RFC 1166 Internet Numbers July 1990 D 128.44.rrr.rrr WSMR-NET1 [CAS1] C 128.45.rrr.rrr DEC-WRL-NET [BKR] R 128.46.rrr.rrr PURDUE-NET [JRS8] D 128.47.rrr.rrr TACTNET [MB31] G 128.48.rrr.rrr UCDLA-NET-B [CL64] R 128.49.rrr.rrr NOSC-ETHER [RLB3] G 128.50.rrr.rrr COINS [RLS6] G 128.51.rrr.rrr COINSTNET [RLS6] R 128.52.rrr.rrr MIT-AI-NET [CL11] R 128.53.rrr.rrr SAC-PR-2 [GMR] R 128.54.rrr.rrr UCSD [GH29] R 128.55.rrr.rrr NMFECC [RJA21] D 128.56.rrr.rrr USNA-NET [RAD15] D 128.57.rrr.rrr DEMO-PR-2 [DM261] C 128.58.rrr.rrr SLCS [CG64] R 128.59.rrr.rrr CU-NET [BC14] D 128.60.rrr.rrr NRL-ETHER [WF3] R 128.61.rrr.rrr GATECH [DD11] R 128.62.rrr.rrr MCC-NET [CBD] R 128.63.rrr.rrr BRL-SUBNET [TS9] 128.64.rrr.rrr-128.79.rrr.rrr Unassigned [NIC] D 128.80.rrr.rrr CECOMNET [PFS2] R 128.81.rrr.rrr SYMBOLICS [SE31] R 128.82.rrr.rrr ODU [CE55] R 128.83.rrr.rrr UTAUSTIN [TLL8] R 128.84.rrr.rrr CORNELL-NET [DK2] C*128.85.rrr.rrr DRILL-NET [DBJ4] R 128.86.rrr.rrr JANET [RHC3] R 128.87.rrr.rrr HIRST [RHC3] R*128.88.rrr.rrr HP-NET [AG67] R 128.89.rrr.rrr BBN-ENET [SGC] C*128.90.rrr.rrr SCRIBE [ERC1] R 128.91.rrr.rrr UPENN [JDH29] R 128.92.rrr.rrr INTELLINET [RJL3]
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