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INTERNET PROTOCOL ADDRESS SPACE
The allocation of Internet Protocol version 4 (IPv4) address space to
various registries is listed here. Originally, all the IPv4 address
spaces was managed directly by the IANA. Later parts of the address
space were allocated to various other registries to manage for
particular purposes or regional areas of the world. RFC 1466
documents most of these allocations.
Address Block Registry - Purpose Date
--------------- --------------------------------------- ------
000/8 IANA - Reserved Sep 81
001/8 IANA - Reserved Sep 81
002/8 IANA - Reserved Sep 81
003/8 General Electric Company May 94
004/8 Bolt Beranek and Newman Inc. Dec 92
005/8 IANA - Reserved Jul 95
006/8 Army Information Systems Center Feb 94
007/8 IANA - Reserved Apr 95
008/8 Bolt Beranek and Newman Inc. Dec 92
009/8 IBM Aug 92
010/8 IANA - Private Use Jun 95
011/8 DoD Intel Information Systems May 93
012/8 AT&T Bell Laboratories Jun 95
013/8 Xerox Corporation Sep 91
014/8 IANA - Public Data Network Jun 91
015/8 Hewlett-Packard Company Jul 94
016/8 Digital Equipment Corporation Nov 94
017/8 Apple Computer Inc. Jul 92
018/8 MIT Jan 94
019/8 Ford Motor Company May 95
020/8 Computer Sciences Corporation Oct 94
021/8 DDN-RVN Jul 91
022/8 Defense Information Systems Agency May 93
023/8 IANA - Reserved Jul 95
024/8 IANA - Cable Block Jul 95
025/8 Royal Signals and Radar Establishment Jan 95
026/8 Defense Information Systems Agency May 95
027/8 IANA - Reserved Apr 95
028/8 DSI-North Jul 92
029/8 Defense Information Systems Agency Jul 91
030/8 Defense Information Systems Agency Jul 91
031/8 University of California May 94
032/8 Norsk Informasjonsteknologi Jun 94
033/8 DLA Systems Automation Center Jan 91
034/8 Halliburton Company Mar 93
035/8 MERIT Computer Network Apr 94
036/8 Stanford University Apr 93
037/8 IANA - Reserved Apr 95
038/8 Performance Systems International Sep 94
039/8 IANA - Reserved Apr 95
040/8 Eli Lily and Company Jun 94
041/8 IANA - Reserved May 95
042/8 IANA - Reserved Jul 95
043/8 Japan Inet Jan 91
044/8 Amateur Radio Digital Communications Jul 92
045/8 Interop Show Network Jan 95
046/8 Bolt Beranek and Newman Inc. Dec 92
047/8 Bell-Northern Research Jan 91
048/8 Prudential Securities Inc. May 95
049/8 Joint Technical Command May 94
Returned to IANA Mar 98
050/8 Joint Technical Command May 94
Returned to IANA Mar 98
051/8 Deparment of Social Security of UK Aug 94
052/8 E.I. duPont de Nemours and Co., Inc. Dec 91
053/8 Cap Debis CCS Oct 93
054/8 Merck and Co., Inc. Mar 92
055/8 Boeing Computer Services Apr 95
056/8 U.S. Postal Service Jun 94
057/8 SITA May 95
058/8 IANA - Reserved Sep 81
059/8 IANA - Reserved Sep 81
060/8 IANA - Reserved Sep 81
061/8 APNIC - Pacific Rim Apr 97
062/8 RIPE NCC - Europe Apr 97
063/8 ARIN Apr 97
064-095/8 IANA - Reserved Sep 81
096-126/8 IANA - Reserved Sep 81
127/8 IANA - Reserved Sep 81
128-191/8 Various Registries May 93
192/8 Various Registries - MultiRegional May 93
193/8 RIPE NCC - Europe May 93
194/8 RIPE NCC - Europe May 93
195/8 RIPE NCC - Europe May 93
196/8 Various Registries May 93
197/8 IANA - Reserved May 93
198/8 Various Registries May 93
199/8 ARIN - North America May 93
200/8 ARIN - Central and South America May 93
201/8 Reserved - Central and South America May 93
202/8 APNIC - Pacific Rim May 93
203/8 APNIC - Pacific Rim May 93
204/8 ARIN - North America Mar 94
205/8 ARIN - North America Mar 94
206/8 ARIN - North America Apr 95
207/8 ARIN - North America Nov 95
208/8 ARIN - North America Apr 96
209/8 ARIN - North America Jun 96
210/8 APNIC - Pacific Rim Jun 96
211/8 APNIC - Pacific Rim Jun 96
212/8 RIPE NCC - Europe Oct 97
213/8 IANA - Reserved Sep 81
214/8 US-DOD Mar 98
215/8 US-DOD Mar 98
216/8 ARIN - North America Apr 98
217/8 IANA - Reserved Sep 81
218-223/8 IANA - Reserved Sep 81
224-239/8 IANA - Multicast Sep 81
240-255/8 IANA - Reserved Sep 81
[]
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