Some large /8 blocks of IPv4 addresses, the former Class A network blocks, are assigned in whole to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority (IANA), or a regional Internet registry.

Each /8 block contains 2563 = 224 = 16,777,216 addresses, which covers the whole range of the last three delimited segments of an IP address. This means that 256 /8 address blocks fit into the entire IPv4 space.

As IPv4 address exhaustion has advanced to its final stages, some organizations, such as Stanford University, formerly using 36.0.0.0/8, have returned their allocated blocks (in this case to APNIC) to assist in the delay of the exhaustion date.

List of reserved /8 blocks

See also: Reserved IP addresses
Block Organization IANA date RIR date Notes
0.0.0.0/8 IANA - Local Identification 1981-09 Originally IANA - Reserved 1981-09. 0.0.0.0/8 reserved for self-identification.[1]
10.0.0.0/8 IANA - Private Use 1995-06 Reserved for Private Networks.[2] Formerly ARPANET.[3]
127.0.0.0/8 IANA - Loopback 1981-09 127.0.0.0/8 is reserved for loopback.[1]
224.0.0.0/8–239.0.0.0/8 Multicast 1981-09 1991-05-22 Multicast (formerly "Class D"[4]) registered in [1].
240.0.0.0/8–255.0.0.0/8 Future Use 1981-09 Reserved for future use (formerly "Class E"[5]). 255.255.255.255 is reserved for "limited broadcast" destination address.[6][7]

List of assigned /8 blocks to commercial organisations

Block Organization IANA date RIR date Notes
12.0.0.0/8 AT&T Services 1995-06 1983-08-23 Originally AT&T Bell Laboratories, but retained by AT&T when Bell Labs was spun off to Lucent Technologies in 1996. Assignment administered by ARIN (Legacy space)
17.0.0.0/8 Apple Inc. 1992-07 1990-04-16 Assignment administered by ARIN (Legacy space)
19.0.0.0/8 Ford Motor Company 1995-05 1988-06-15 Assignment administered by ARIN (Legacy space)
38.0.0.0/8 Cogent Communications 1994-09 1991-04-16 Formerly PSINet. Assignment administered by ARIN (Legacy space)
48.0.0.0/8 Prudential Securities Inc. 1995-05 1990-12-07 Assignment administered by ARIN (Legacy space)
53.0.0.0/8 Mercedes-Benz Group AG 1993-10 1970-01-01 Assignment administered by RIPE (Legacy space)
73.0.0.0/8 Comcast Corporation[8] N/A 2005-04-19 Assignment administered by ARIN.

List of assigned /8 blocks to the United States Department of Defense

Block Organization IANA date RIR date Notes
6.0.0.0/8 Army Information Systems Center 1994-02 1994-02-01 Headquarters, USAISC
7.0.0.0/8 DoD Network Information Center 1995-04 1997-11-24 Formerly IANA - Reserved 1995-04.
Entirely assigned to DoD Network Information Center (DNIC) 1997-11-24.
Updated to Administered by ARIN not before 2007.
11.0.0.0/8 DoD Intel Information Systems 1993-05 1984-01-19
21.0.0.0/8 DDN-RVN 1991-07 1991-07-01 DoD Network Information Center (DNIC)
22.0.0.0/8 Defense Information Systems Agency 1993-05 1989-06-26 DoD Network Information Center (DNIC)
26.0.0.0/8 Defense Information Systems Agency 1995-05 1995-05-01 DoD Network Information Center (DNIC)
28.0.0.0/8 DSI-North 1992-07 DoD Network Information Center (DNIC)
29.0.0.0/8 Defense Information Systems Agency 1991-07 1991-07-01 DoD Network Information Center (DNIC)
30.0.0.0/8 Defense Information Systems Agency 1991-07 1991-07-01 DoD Network Information Center (DNIC)
33.0.0.0/8 DLA Systems Automation Center 1991-01 1991-01-01 DoD Network Information Center (DNIC)
55.0.0.0/8 DoD Network Information Center 1995-04 1996-10-26 Headquarters, USAISC. Formerly Boeing Computer Services 1995-04.
Updated to DoD Network Information Center in 2007-02.
214.0.0.0/8 US-DOD 1998-03 1998-03-27 DoD Network Information Center (DNIC)
215.0.0.0/8 US-DOD 1998-03 1998-06-05 DoD Network Information Center (DNIC)

List of assigned /8 blocks to the regional Internet registries

Map of regional Internet registries

The regional Internet registries (RIRs) allocate IPs within a particular region of the world.

Block Organization IANA date RIR date Notes
1.0.0.0/8 APNIC 2010-01 Formerly IANA - reserved 1981-09.
2.0.0.0/8 RIPE NCC 2009-10 Formerly IANA - reserved 1981-09.
3.0.0.0/8 ARIN 1994-05 Amazon.com.[9] Formerly General Electric Company.
4.0.0.0/8 ARIN 1992-12 Various registries (maintained by ARIN). Formerly Bolt Beranek and Newman Inc., then GTE, then Genuity, then Level 3 Communications, Inc.
5.0.0.0/8 RIPE NCC 2010-11 Formerly IANA - reserved 1995-07.
8.0.0.0/8 ARIN 1992-12 1992-12-01 Various registries (maintained by ARIN). Formerly Bolt Beranek and Newman Inc., then GTE, then Genuity, then Level 3 Communications, Inc.
9.0.0.0/8 ARIN 1992-08 IBM except for 9.9.9.0/24, which is Quad9.
13.0.0.0/8 ARIN 1991-09 Various registries (maintained by ARIN). Formerly Xerox.
14.0.0.0/8 APNIC 2010-04 Starting 1991-06-01, was used to map Public Data Network (X.121) addresses to IP addresses. Returned to IANA 2008-01-22. This network was reclaimed by IANA in 2007 and was subsequently re-allocated in 2010. See RFC 877 and RFC 1356 for historical information.[10]
15.0.0.0/8 ARIN 1991-09 Various registries (maintained by ARIN). Formerly Hewlett-Packard Company. HP Inc still uses a portion of the block.
16.0.0.0/8 ARIN 1994-11 1989-05-18 Various registries (maintained by ARIN). Formerly Digital Equipment Corporation, then Compaq, then Hewlett-Packard.
18.0.0.0/8 ARIN 1994-01 Various registries (maintained by ARIN). Formerly MIT.
20.0.0.0/8 ARIN 1994-10 Various registries (maintained by ARIN). Formerly DXC Technology. Computer Sciences Corporation, who owned this block, merged with HP Enterprise Services to create DXC Technology on 3 April 2017.[11][12]
23.0.0.0/8 ARIN 2010-11 Formerly IANA - reserved 1995-07.
24.0.0.0/8 ARIN 2001-05 2001-05-01 Formerly IANA - Cable Block 1995-07, then ARIN - Cable Block 2001-05.[13] Updated to ARIN not before 2007.
25.0.0.0/8 RIPE NCC 1995-01 As of 2005-08-23 entire block assigned to UK Ministry of Defence
27.0.0.0/8 APNIC 2010-01 Formerly IANA - reserved 1995-04.
31.0.0.0/8 RIPE NCC 2010-05 2010-05-18 Formerly IANA - reserved 1991-04.
32.0.0.0/8 ARIN 1994-06 Various registries (maintained by ARIN). Formerly AT&T Global Network Services. Originally Norsk Informasjonsteknologi (at that time maintained by RIPE NCC). IBM acquired Norsk Informasjonsteknologi (Norway) in 1995.
34.0.0.0/8 ARIN 1993-03 Various registries (maintained by ARIN). Formerly Halliburton Company.
35.0.0.0/8 ARIN 1994-04 2012-08 Various registries (Maintained by ARIN). Formerly Merit Network 1986.
36.0.0.0/8 APNIC 2010-10 Formerly Stanford University 1993-04, then IANA - Reserved 2000-07.
37.0.0.0/8 RIPE NCC 2010-11 Formerly IANA - Reserved 1995-04.
39.0.0.0/8 APNIC 2011-01 Formerly IANA - Reserved 1995-04.
40.0.0.0/8 ARIN 1994-06 Various registries (Maintained by ARIN).
41.0.0.0/8 AFRINIC 2005-04 Formerly IANA - Reserved 1995-05.
42.0.0.0/8 APNIC 2010-10 Formerly IANA - Reserved 1995-07.
43.0.0.0/8 APNIC 1991-01 1989-02-21 Various registries (Maintained by APNIC). Originally Japan Inet 1991-01 (IANA date) or 1989-02-21 (RIR date). Administered by APNIC not before 2007.
44.0.0.0/8 ARIN 1992-07 2019-07-18 Various registries (Maintained by ARIN). Originally Amateur Radio Digital Communications. 44.192.0.0/10 was sold to Amazon on 2019-07-18.[14]
45.0.0.0/8 ARIN 1995-01 1991-09-09 Various registries (Maintained by ARIN). Formerly Interop Show Network 1995-01 or 1991-09-09 (RIR date). Returned to ARIN in 2010-10 except a /15 block. In 2011 it became available for distribution (or possibly be returned to the IANA, depending on the global policy in effect at that time).[15]
46.0.0.0/8 RIPE NCC 2009-09 Formerly Bolt Beranek and Newman Inc. 1992-12. Returned to IANA in 2007-04.[16] Updated to IANA - Reserved in 2007-04.
47.0.0.0/8 ARIN 1991-01 Various registries (Maintained by ARIN). Formerly Bell-Northern Research, which became Northern Telecom, aka, Nortel, until its demise, circa 2010.
49.0.0.0/8 APNIC 2010-08 Formerly Joint Technical Command (Returned to IANA Mar 98) 1994-05. Updated to IANA - Reserved in 2007-05.
50.0.0.0/8 ARIN 2010-02 Formerly Joint Technical Command (Returned to IANA Mar 98) 1994-05. Updated to IANA - Reserved in 2007-05.
51.0.0.0/8 RIPE NCC 1994-08 Various registries (Maintained by RIPE NCC). Formerly UK Government Department for Work and Pensions.
52.0.0.0/8 ARIN 1991-12 Formerly DuPont.
54.0.0.0/8 ARIN 1992-03 Various registries (Maintained by ARIN).
56.0.0.0/8 ARIN 1992-11 Formerly United States Postal Service.
57.0.0.0/8 RIPE NCC 1995-05 Formerly SITA.
58.0.0.0/8 APNIC 2004-04
59.0.0.0/8 APNIC 2004-04
60.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
61.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
62.0.0.0/8 RIPE NCC 1997-04
63.0.0.0/8 ARIN 1997-04
64.0.0.0/8 ARIN 1999-07
65.0.0.0/8 ARIN 2000-07
66.0.0.0/8 ARIN 2000-07
67.0.0.0/8 ARIN 2001-05
68.0.0.0/8 ARIN 2001-06
69.0.0.0/8 ARIN 2002-08
70.0.0.0/8 ARIN 2004-01
71.0.0.0/8 ARIN 2004-08
72.0.0.0/8 ARIN 2004-08
74.0.0.0/8 ARIN 2005-06
75.0.0.0/8 ARIN 2005-06
76.0.0.0/8 ARIN 2005-06
77.0.0.0/8 RIPE NCC 2006-08
78.0.0.0/8 RIPE NCC 2006-08
79.0.0.0/8 RIPE NCC 2006-08
80.0.0.0/8 RIPE NCC 2001-04
81.0.0.0/8 RIPE NCC 2001-04
82.0.0.0/8 RIPE NCC 2002-11
83.0.0.0/8 RIPE NCC 2003-11
84.0.0.0/8 RIPE NCC 2003-11
85.0.0.0/8 RIPE NCC 2004-04
86.0.0.0/8 RIPE NCC 2004-04
87.0.0.0/8 RIPE NCC 2004-04
88.0.0.0/8 RIPE NCC 2010-01 Formerly IANA - Reserved 1981-09.
89.0.0.0/8 RIPE NCC 2005-06
90.0.0.0/8 RIPE NCC 2005-06 Except for 90.0.0.0/9, which is Orange
91.0.0.0/8 RIPE NCC 2005-06
92.0.0.0/8 RIPE NCC 2007-03
93.0.0.0/8 RIPE NCC 2007-03
94.0.0.0/8 RIPE NCC 2007-07
95.0.0.0/8 RIPE NCC 2007-07
96.0.0.0/8 ARIN 2006-10
97.0.0.0/8 ARIN 2006-10
98.0.0.0/8 ARIN 2006-10
99.0.0.0/8 ARIN 2006-10
100.0.0.0/8 ARIN 2010-11 100.64.0.0/10 reserved for Carrier-grade NAT (detailed in RFC 6598).
101.0.0.0/8 APNIC 2010-08
102.0.0.0/8 AFRINIC 2011-02
103.0.0.0/8 APNIC 2011-02
104.0.0.0/8 ARIN 2011-02
105.0.0.0/8 AFRINIC 2010-11
106.0.0.0/8 APNIC 2011-01
107.0.0.0/8 ARIN 2010-02
108.0.0.0/8 ARIN 2008-12
109.0.0.0/8 RIPE NCC 2009-01
110.0.0.0/8 APNIC 2008-11
111.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
112.0.0.0/8 APNIC 2008-05
113.0.0.0/8 APNIC 2008-05
114.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
115.0.0.0/8 APNIC 2007-10
116.0.0.0/8 APNIC 2007-01
117.0.0.0/8 APNIC 2007-01
118.0.0.0/8 APNIC 2007-01
119.0.0.0/8 APNIC 2007-01
120.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
121.0.0.0/8 APNIC 2006-01
122.0.0.0/8 APNIC 2006-01
123.0.0.0/8 APNIC 2006-01
124.0.0.0/8 APNIC 2005-01
125.0.0.0/8 APNIC 2005-01
126.0.0.0/8 APNIC 2005-01 SOFTBANK Corp.
128.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN). 128.0.0.0 is the start address of formerly "Class B".
129.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
130.0.0.0/8 Various registries
131.0.0.0/8 Various registries
132.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
133.0.0.0/8 APNIC 1997-03 JPNIC[17]
134.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
135.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
136.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
137.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
138.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
139.0.0.0/8 MIX Various registries
140.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
141.0.0.0/8 RIPE NCC 1993-05 Various registries (Maintained by RIPE NCC).
142.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
143.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
144.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
145.0.0.0/8 RIPE NCC 1993-05 Various registries (Maintained by RIPE NCC).
146.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
147.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
148.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
149.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
150.0.0.0/8 APNIC 1993-05 Various registries (Maintained by APNIC).
151.0.0.0/8 RIPE NCC 1993-05 Various registries (Maintained by RIPE NCC).
152.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
153.0.0.0/8 APNIC 1993-05 Various registries (Maintained by APNIC).
154.0.0.0/8 AFRINIC 1993-05 Various registries (Maintained by AFRINIC).
155.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
156.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
157.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
158.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
159.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
160.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
161.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
162.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
163.0.0.0/8 APNIC 1993-05 Various registries (Maintained by APNIC).
164.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
165.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
166.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
167.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
168.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
169.0.0.0/8 ARIN 1993-05 1993-05-01 Various registries (Maintained by ARIN). 169.254.0.0/16 (169.254.0.0–169.254.255.255) reserved for link-local addressing (RFC 6890).
170.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN).
171.0.0.0/8 APNIC 1993-05 Various registries (Maintained by APNIC).
172.0.0.0/8 ARIN 1993-05 1993-05-01 Various registries (Maintained by ARIN). 172.16.0.0/12 (172.16.0.0–172.31.255.255) reserved for private networks (RFC 1918).
173.0.0.0/8 ARIN 2008-02
174.0.0.0/8 ARIN 2008-02
175.0.0.0/8 APNIC 2009-08
176.0.0.0/8 RIPE NCC 2010-05
177.0.0.0/8 LACNIC 2010-06
178.0.0.0/8 RIPE NCC 2009-01 Various registries (Maintained by RIPE NCC).
179.0.0.0/8 LACNIC 2011-02
180.0.0.0/8 APNIC 2009-04
181.0.0.0/8 LACNIC 2010-06
182.0.0.0/8 APNIC 2009-08
183.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
184.0.0.0/8 ARIN 2008-12
185.0.0.0/8 RIPE NCC 2011-02 Various registries (Maintained by RIPE NCC).
186.0.0.0/8 LACNIC 2007-09
187.0.0.0/8 LACNIC 2007-09
188.0.0.0/8 RIPE NCC 1993-05 Various registries (Maintained by RIPE NCC).
189.0.0.0/8 LACNIC 1995-06
190.0.0.0/8 LACNIC 1995-06
191.0.0.0/8 LACNIC 1993-05 Various registries (Maintained by LACNIC).
192.0.0.0/8 ARIN 1993-05 1993-05-01 Various registries (Maintained by ARIN). 192.0.2.0/24 reserved for TEST-NET-1 (RFC 5737). 192.88.99.0/24 reserved for 6to4 Relay Anycast (RFC 3068). 192.168.0.0/16 (192.168.0.0–192.168.255.255) reserved for private networks (RFC 1918). 192.0.0.0/24 reserved for IANA IPv4 Special Purpose Address Registry (RFC 5736). 192.0.0.0 is the start address of formerly "Class C".
193.0.0.0/8 RIPE NCC 1993-05
194.0.0.0/8 RIPE NCC 1993-05
195.0.0.0/8 RIPE NCC 1993-05
196.0.0.0/8 AFRINIC 1993-05 Various registries (Maintained by AFRINIC).
197.0.0.0/8 AFRINIC 2008-10
198.0.0.0/8 ARIN 1993-05 Various registries (Maintained by ARIN). 198.18.0.0/15 reserved for Network Interconnect Device Benchmark Testing (RFC 6890). 198.51.100.0/24 reserved for TEST-NET-2 (RFC 5737).
199.0.0.0/8 ARIN 1993-05
200.0.0.0/8 LACNIC 2002-11
201.0.0.0/8 LACNIC 2003-04
202.0.0.0/8 APNIC 2009-10 Various registries (Maintained by APNIC). 202.123.0.0/19 transferred to AFRINIC
203.0.0.0/8 APNIC 1993-05 203.0.113.0/24 reserved for TEST-NET-3 (RFC 5737).
204.0.0.0/8 ARIN 1994-03
205.0.0.0/8 ARIN 1994-03
206.0.0.0/8 ARIN 1995-04
207.0.0.0/8 ARIN 1995-11
208.0.0.0/8 ARIN 1996-04
209.0.0.0/8 ARIN 1996-06
210.0.0.0/8 APNIC 1996-06
211.0.0.0/8 APNIC 1996-06
212.0.0.0/8 RIPE NCC 1997-10
213.0.0.0/8 RIPE NCC 1993-10
216.0.0.0/8 ARIN 1998-04
217.0.0.0/8 RIPE NCC 2000-06 2002-06-25
218.0.0.0/8 APNIC 2010-01 Formerly IANA - Reserved 1981-09.
219.0.0.0/8 APNIC 2001-09
220.0.0.0/8 APNIC 2001-12
221.0.0.0/8 APNIC 2002-07
222.0.0.0/8 APNIC 2003-02
223.0.0.0/8 APNIC 2010-04

Note that this list may not include current assignments of /8 blocks to all regional or national Internet registries.

Original list of IPv4 assigned address blocks

The original list of IPv4 address blocks was published in September 1981.[3] In previous versions of the document,[18][19] network numbers were 8-bit numbers rather than the 32-bit numbers used in IPv4. At that time, three networks were added that were not listed earlier: 42.rrr.rrr.rrr, 43.rrr.rrr.rrr, and 44.rrr.rrr.rrr.

The relevant portion of RFC 790 is reproduced here with minor changes:

  • 000.rrr.rrr.rrr Reserved [JBP]
  • 001.rrr.rrr.rrr BBN-PR BBN Packet Radio Network [DCA2]
  • 002.rrr.rrr.rrr SF-PR-1 SF Packet Radio Network [JEM]
  • 003.rrr.rrr.rrr BBN-RCC BBN RCC Network [SGC]
  • 004.rrr.rrr.rrr SATNET Atlantic Satellite Network [DM11]
  • 005.rrr.rrr.rrr SILL-PR Ft. Sill Packet Radio Network[JEM]
  • 006.rrr.rrr.rrr SF-PR-2 SF Packet Radio Network [JEM]
  • 007.rrr.rrr.rrr CHAOS MIT CHAOS Network [MOON]
  • 008.rrr.rrr.rrr CLARKNET SATNET subnet for Clarksburg [DM11]
  • 009.rrr.rrr.rrr BRAGG-PR Ft. Bragg Packet Radio Net [JEM]
  • 010.rrr.rrr.rrr ARPANET ARPANET [VGC]
  • 011.rrr.rrr.rrr UCLNET University College London [PK]
  • 012.rrr.rrr.rrr CYCLADES CYCLADES [VGC]
  • 013.rrr.rrr.rrr Unassigned [JBP]
  • 014.rrr.rrr.rrr TELENET TELENET [VGC]
  • 015.rrr.rrr.rrr EPSS British Post Office EPSS [PK]
  • 016.rrr.rrr.rrr DATAPAC DATAPAC [VGC]
  • 017.rrr.rrr.rrr TRANSPAC TRANSPAC [VGC]
  • 018.rrr.rrr.rrr LCSNET MIT LCS Network [DDC2]
  • 019.rrr.rrr.rrr TYMNET TYMNET [VGC]
  • 020.rrr.rrr.rrr DC-PR D.C. Packet Radio Network [VGC]
  • 021.rrr.rrr.rrr EDN DCEC EDN [EC5]
  • 022.rrr.rrr.rrr DIALNET DIALNET [MRC]
  • 023.rrr.rrr.rrr MITRE MITRE Cablenet [APS]
  • 024.rrr.rrr.rrr BBN-LOCAL BBN Local Network [SGC]
  • 025.rrr.rrr.rrr RSRE-PPSN RSRE / PPSN [BD2]
  • 026.rrr.rrr.rrr AUTODIN-II AUTODIN II [EC5]
  • 027.rrr.rrr.rrr NOSC-LCCN NOSC / LCCN [KTP]
  • 028.rrr.rrr.rrr WIDEBAND Wide Band Satellite Network [CJW2]
  • 029.rrr.rrr.rrr DCN-COMSAT COMSAT Dist. Comp. Network [DLM1]
  • 030.rrr.rrr.rrr DCN-UCL UCL Dist. Comp. Network [PK]
  • 031.rrr.rrr.rrr BBN-SAT-TEST BBN SATNET Test Network [DM11]
  • 032.rrr.rrr.rrr UCL-CR1 UCL Cambridge Ring 1 [PK]
  • 033.rrr.rrr.rrr UCL-CR2 UCL Cambridge Ring 2 [PK]
  • 034.rrr.rrr.rrr MATNET Mobile Access Terminal Net [DM11]
  • 035.rrr.rrr.rrr NULL UCL/RSRE Null Network [BD2]
  • 036.rrr.rrr.rrr SU-NET Stanford University Ethernet [MRC]
  • 037.rrr.rrr.rrr DECNET Digital Equipment Network [DRL]
  • 038.rrr.rrr.rrr DECNET-TEST Test Digital Equipment Net [DRL]
  • 039.rrr.rrr.rrr SRINET SRI Local Network [GEOF]
  • 040.rrr.rrr.rrr CISLNET CISL Multics Network [CH2]
  • 041.rrr.rrr.rrr BBN-LN-TEST BBN Local Network Testbed [KTP]
  • 042.rrr.rrr.rrr S1NET LLL-S1-NET [EAK]
  • 043.rrr.rrr.rrr INTELPOST COMSAT INTELPOST [DLM1]
  • 044.rrr.rrr.rrr AMPRNET Amateur Radio Experiment Net [HM]

See also

Notes

  1. ^ a b M. Cotton; L. Vegoda; B. Haberman (April 2013). R. Bonica (ed.). Special-Purpose IP Address Registries. IETF. doi:10.17487/RFC6890. ISSN 2070-1721. BCP 153. RFC 6890. Best Common Practice. Obsoletes RFC 4773, 5156, 5735 and 5736. Updated by RFC 8190.
  2. ^ Y. Rekhter; B. Moskowitz; D. Karrenberg; G. J. de Groot; E. Lear (February 1996). Address Allocation for Private Internets. Network Working Group. doi:10.17487/RFC1918. BCP 5. RFC 1918. Best Common Practice. Obsoletes RFC 1627 and 1597. Updated by RFC 6761.
  3. ^ a b J. Postel (September 1981). ASSIGNED NUMBERS. Network Working Group. doi:10.17487/RFC0790. RFC 790. Obsolete. Obsoleted by RFC 820. Obsoletes RFC 776, 770, 762, 758, 755, 750, 739, 604, 503, 433 and 349.Obsoletes IENs: 127, 117, 93.
  4. ^ M. Cotton; L. Vegoda; D. Meyer (March 2010). IANA Guidelines for IPv4 Multicast Address Assignments. IETF. doi:10.17487/RFC5771. ISSN 2070-1721. BCP 51. RFC 5771. Best Common Practice. Obsoletes RFC 3138 and 3171. Updates RFC 2780.
  5. ^ S. Deering (August 1989). Host Extensions for IP Multicasting. Network Working Group. doi:10.17487/RFC1112. STD 5. RFC 1112. Internet Standard 5. Obsoletes RFC 988 and 1054. Updated by RFC 2236.
  6. ^ J. Mogul (October 1984). BROADCASTING INTERNET DATAGRAMS. Network Working Group. doi:10.17487/RFC0919. STD 5. RFC 919. Internet Standard 5.
  7. ^ J. Mogul (October 1984). BROADCASTING INTERNET DATAGRAMS IN THE PRESENCE OF SUBNETS. Network Working Group. doi:10.17487/RFC0922. STD 5. RFC 922. Internet Standard 5.
  8. ^ "Whois-RWS".
  9. ^ "Tell HN: Amazon now owns 3.0.0.0/8". Hacker News.[self-published source]
  10. ^ "Public Data Network Numbers". Internet Assigned Numbers Authority. 24 June 2010. Retrieved 27 March 2011.
  11. ^ "CSC Announces Merger with Enterprise Services Segment of Hewlett Packard Enterprise to create a Global IT Services Leader". Press release. 24 May 2016. Retrieved 4 November 2016.
  12. ^ "New York Stock Exchange | DXC Technology". www.nyse.com. Archived from the original on 6 April 2017.
  13. ^ "Network 24 - Cable Block". Internet Assigned Numbers Authority. 11 May 2001. Archived from the original on 27 June 2011. Retrieved 27 March 2011.
  14. ^ "AMPRNet | Amateur Radio Digital Communications".
  15. ^ "IPv4 IANA Free Pool Depletion – FAQ". American Registry for Internet Numbers. Archived from the original on 28 June 2011. Retrieved 27 March 2011.
  16. ^ van Beijnum, Iljitsch (September 2007). "IPv4 Address Space: 2.46 Billion Down, 1.25 Billion to Go". 10 (3). Retrieved 27 March 2011. ((cite journal)): Cite journal requires |journal= (help)
  17. ^ "133.0.0.0/8 Japan Network Information Center Prefix BGP Network Information - BGPView". bgpview.io. Retrieved 25 January 2022.
  18. ^ J. Postel (January 1981). ASSIGNED NUMBERS. IETF. doi:10.17487/RFC0776. RFC 776. Obsolete. Obsoleted by RFC 790. Obsoletes RFC 770 and IEN 127.
  19. ^ J. Postel (January 1981). ASSIGNED NUMBERS. IETF. doi:10.17487/RFC0750. RFC 750. Obsolete. Obsoleted by RFC 755. Obsoletes RFC 739.

References

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