IANA IPv4 Address Space Registry

Last Updated
2015-08-10
Registration Procedure(s)
Allocations to RIRs are made in line with the Global Policy published at [http://www.icann.org/en/resources/policy/global-addressing]. 
All other assignments require IETF Review.
Description
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 [RFC1466] documents most of these allocations.
Reference
[RFC7249]
Available Formats

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Prefix Designation Date WHOIS RDAP Status [1] Note
000/8 IANA - Local Identification 1981-09 RESERVED [2]
001/8 APNIC 2010-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
002/8 RIPE NCC 2009-09 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
003/8 General Electric Company 1994-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
004/8 Level 3 Communications, Inc. 1992-12 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
005/8 RIPE NCC 2010-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
006/8 Army Information Systems Center 1994-02 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
007/8 Administered by ARIN 1995-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
008/8 Level 3 Communications, Inc. 1992-12 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
009/8 IBM 1992-08 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
010/8 IANA - Private Use 1995-06 RESERVED [3]
011/8 DoD Intel Information Systems 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
012/8 AT&T Bell Laboratories 1995-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
013/8 Administered by ARIN 1991-09 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
014/8 APNIC 2010-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED [4]
015/8 Hewlett-Packard Company 1994-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
016/8 Digital Equipment Corporation 1994-11 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
017/8 Apple Computer Inc. 1992-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
018/8 MIT 1994-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
019/8 Ford Motor Company 1995-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
020/8 Computer Sciences Corporation 1994-10 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
021/8 DDN-RVN 1991-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
022/8 Defense Information Systems Agency 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
023/8 ARIN 2010-11 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
024/8 ARIN 2001-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
025/8 UK Ministry of Defence 1995-01 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
026/8 Defense Information Systems Agency 1995-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
027/8 APNIC 2010-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
028/8 DSI-North 1992-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
029/8 Defense Information Systems Agency 1991-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
030/8 Defense Information Systems Agency 1991-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
031/8 RIPE NCC 2010-05 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
032/8 Administered by ARIN 1994-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
033/8 DLA Systems Automation Center 1991-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
034/8 Halliburton Company 1993-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
035/8 Administered by ARIN 1994-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
036/8 APNIC 2010-10 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
037/8 RIPE NCC 2010-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
038/8 PSINet, Inc. 1994-09 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
039/8 APNIC 2011-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
040/8 Administered by ARIN 1994-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
041/8 AFRINIC 2005-04 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
ALLOCATED
042/8 APNIC 2010-10 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
043/8 Administered by APNIC 1991-01 whois.apnic.net https://rdap.apnic.net/ LEGACY
044/8 Amateur Radio Digital Communications 1992-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
045/8 Administered by ARIN 1995-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
046/8 RIPE NCC 2009-09 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
047/8 Administered by ARIN 1991-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
048/8 Prudential Securities Inc. 1995-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
049/8 APNIC 2010-08 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
050/8 ARIN 2010-02 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
051/8 Administered by RIPE NCC 1994-08 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
052/8 Administered by ARIN 1991-12 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
053/8 Daimler AG 1993-10 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
054/8 Administered by ARIN 1992-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
055/8 DoD Network Information Center 1995-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
056/8 US Postal Service 1994-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
057/8 Societe Internationale de Telecommunications Aeronautiques S.C.R.L. 1995-05 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
058/8 APNIC 2004-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
059/8 APNIC 2004-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
060/8 APNIC 2003-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
061/8 APNIC 1997-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
062/8 RIPE NCC 1997-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
063/8 ARIN 1997-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
064/8 ARIN 1999-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
065/8 ARIN 2000-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
066/8 ARIN 2000-07 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
067/8 ARIN 2001-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
068/8 ARIN 2001-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
069/8 ARIN 2002-08 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
070/8 ARIN 2004-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
071/8 ARIN 2004-08 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
072/8 ARIN 2004-08 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
073/8 ARIN 2005-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
074/8 ARIN 2005-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
075/8 ARIN 2005-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
076/8 ARIN 2005-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
077/8 RIPE NCC 2006-08 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
078/8 RIPE NCC 2006-08 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
079/8 RIPE NCC 2006-08 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
080/8 RIPE NCC 2001-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
081/8 RIPE NCC 2001-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
082/8 RIPE NCC 2002-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
083/8 RIPE NCC 2003-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
084/8 RIPE NCC 2003-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
085/8 RIPE NCC 2004-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
086/8 RIPE NCC 2004-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
087/8 RIPE NCC 2004-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
088/8 RIPE NCC 2004-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
089/8 RIPE NCC 2005-06 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
090/8 RIPE NCC 2005-06 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
091/8 RIPE NCC 2005-06 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
092/8 RIPE NCC 2007-03 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
093/8 RIPE NCC 2007-03 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
094/8 RIPE NCC 2007-07 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
095/8 RIPE NCC 2007-07 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
096/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
097/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
098/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
099/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
100/8 ARIN 2010-11 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED [5]
101/8 APNIC 2010-08 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
102/8 AFRINIC 2011-02 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
ALLOCATED
103/8 APNIC 2011-02 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
104/8 ARIN 2011-02 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
105/8 AFRINIC 2010-11 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
ALLOCATED
106/8 APNIC 2011-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
107/8 ARIN 2010-02 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
108/8 ARIN 2008-12 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
109/8 RIPE NCC 2009-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
110/8 APNIC 2008-11 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
111/8 APNIC 2008-11 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
112/8 APNIC 2008-05 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
113/8 APNIC 2008-05 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
114/8 APNIC 2007-10 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
115/8 APNIC 2007-10 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
116/8 APNIC 2007-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
117/8 APNIC 2007-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
118/8 APNIC 2007-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
119/8 APNIC 2007-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
120/8 APNIC 2007-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
121/8 APNIC 2006-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
122/8 APNIC 2006-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
123/8 APNIC 2006-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
124/8 APNIC 2005-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
125/8 APNIC 2005-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
126/8 APNIC 2005-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
127/8 IANA - Loopback 1981-09 RESERVED [6]
128/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
129/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
130/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
131/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
132/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
133/8 Administered by APNIC 1997-03 whois.apnic.net https://rdap.apnic.net/ LEGACY
134/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
135/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
136/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
137/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
138/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
139/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
140/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
141/8 Administered by RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
142/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
143/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
144/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
145/8 Administered by RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
146/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
147/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
148/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
149/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
150/8 Administered by APNIC 1993-05 whois.apnic.net https://rdap.apnic.net/ LEGACY
151/8 Administered by RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
152/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
153/8 Administered by APNIC 1993-05 whois.apnic.net https://rdap.apnic.net/ LEGACY
154/8 Administered by AFRINIC 1993-05 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
LEGACY
155/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
156/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
157/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
158/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
159/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
160/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
161/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
162/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
163/8 Administered by APNIC 1993-05 whois.apnic.net https://rdap.apnic.net/ LEGACY
164/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
165/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
166/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
167/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
168/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
169/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY [7]
170/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
171/8 Administered by APNIC 1993-05 whois.apnic.net https://rdap.apnic.net/ LEGACY
172/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY [8]
173/8 ARIN 2008-02 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
174/8 ARIN 2008-02 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
175/8 APNIC 2009-08 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
176/8 RIPE NCC 2010-05 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
177/8 LACNIC 2010-06 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
178/8 RIPE NCC 2009-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
179/8 LACNIC 2011-02 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
180/8 APNIC 2009-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
181/8 LACNIC 2010-06 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
182/8 APNIC 2009-08 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
183/8 APNIC 2009-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
184/8 ARIN 2008-12 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
185/8 RIPE NCC 2011-02 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
186/8 LACNIC 2007-09 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
187/8 LACNIC 2007-09 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
188/8 Administered by RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ LEGACY
189/8 LACNIC 1995-06 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
190/8 LACNIC 1995-06 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
191/8 Administered by LACNIC 1993-05 whois.lacnic.net https://rdap.lacnic.net/rdap/ LEGACY
192/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY [9][10]
193/8 RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
194/8 RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
195/8 RIPE NCC 1993-05 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
196/8 Administered by AFRINIC 1993-05 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
LEGACY
197/8 AFRINIC 2008-10 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
ALLOCATED
198/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY [11]
199/8 ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
200/8 LACNIC 2002-11 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
201/8 LACNIC 2003-04 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
202/8 APNIC 1993-05 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
203/8 APNIC 1993-05 whois.apnic.net https://rdap.apnic.net/ ALLOCATED [12]
204/8 ARIN 1994-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
205/8 ARIN 1994-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
206/8 ARIN 1995-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
207/8 ARIN 1995-11 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
208/8 ARIN 1996-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
209/8 ARIN 1996-06 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
210/8 APNIC 1996-06 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
211/8 APNIC 1996-06 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
212/8 RIPE NCC 1997-10 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
213/8 RIPE NCC 1993-10 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
214/8 US-DOD 1998-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
215/8 US-DOD 1998-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
LEGACY
216/8 ARIN 1998-04 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
217/8 RIPE NCC 2000-06 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
218/8 APNIC 2000-12 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
219/8 APNIC 2001-09 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
220/8 APNIC 2001-12 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
221/8 APNIC 2002-07 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
222/8 APNIC 2003-02 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
223/8 APNIC 2010-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
224/8 Multicast 1981-09 RESERVED [13]
225/8 Multicast 1981-09 RESERVED [13]
226/8 Multicast 1981-09 RESERVED [13]
227/8 Multicast 1981-09 RESERVED [13]
228/8 Multicast 1981-09 RESERVED [13]
229/8 Multicast 1981-09 RESERVED [13]
230/8 Multicast 1981-09 RESERVED [13]
231/8 Multicast 1981-09 RESERVED [13]
232/8 Multicast 1981-09 RESERVED [13]
233/8 Multicast 1981-09 RESERVED [13]
234/8 Multicast 1981-09 RESERVED [13][14]
235/8 Multicast 1981-09 RESERVED [13]
236/8 Multicast 1981-09 RESERVED [13]
237/8 Multicast 1981-09 RESERVED [13]
238/8 Multicast 1981-09 RESERVED [13]
239/8 Multicast 1981-09 RESERVED [13][15]
240/8 Future use 1981-09 RESERVED [16]
241/8 Future use 1981-09 RESERVED [16]
242/8 Future use 1981-09 RESERVED [16]
243/8 Future use 1981-09 RESERVED [16]
244/8 Future use 1981-09 RESERVED [16]
245/8 Future use 1981-09 RESERVED [16]
246/8 Future use 1981-09 RESERVED [16]
247/8 Future use 1981-09 RESERVED [16]
248/8 Future use 1981-09 RESERVED [16]
249/8 Future use 1981-09 RESERVED [16]
250/8 Future use 1981-09 RESERVED [16]
251/8 Future use 1981-09 RESERVED [16]
252/8 Future use 1981-09 RESERVED [16]
253/8 Future use 1981-09 RESERVED [16]
254/8 Future use 1981-09 RESERVED [16]
255/8 Future use 1981-09 RESERVED [16][17]

Footnotes

[1]
Indicates the status of address blocks as follows:
RESERVED: designated by the IETF for specific non-global-unicast purposes as noted.
LEGACY: allocated by the central Internet Registry (IR) prior to the Regional Internet Registries
(RIRs). This address space is now administered by individual RIRs as noted, including maintenance
of WHOIS Directory and reverse DNS records. Assignments from these blocks are distributed globally
on a regional basis.
ALLOCATED: delegated entirely to specific RIR as indicated.
UNALLOCATED: not yet allocated or reserved.
[2]
0.0.0.0/8 reserved for self-identification [RFC1122], section 3.2.1.3. 
Reserved by protocol. For authoritative registration, see [IANA registry iana-ipv4-special-registry].
[3]
Reserved for Private-Use Networks [RFC1918].
Complete registration details for 10.0.0.0/8 are found in [IANA registry iana-ipv4-special-registry].
[4]
This was reserved for Public Data Networks [RFC1356]. See [IANA registry public-data-network-numbers].
It was recovered in February 2008 and was subsequently allocated to APNIC in April 2010.
[5]
100.64.0.0/10 reserved for Shared Address Space [RFC6598]. 
Complete registration details for 100.64.0.0/10 are found in [IANA registry iana-ipv4-special-registry].
[6]
127.0.0.0/8 reserved for Loopback [RFC1122], section 3.2.1.3. 
Reserved by protocol. For authoritative registration, see [IANA registry iana-ipv4-special-registry].
[7]
169.254.0.0/16 reserved for Link Local [RFC3927].
Reserved by protocol. For authoritative registration, see [IANA registry iana-ipv4-special-registry].
[8]
172.16.0.0/12 reserved for Private-Use Networks [RFC1918]. 
Complete registration details are found in [IANA registry iana-ipv4-special-registry].
[9]
192.0.2.0/24  reserved for TEST-NET-1 [RFC5737]. 
Complete registration details for 192.0.2.0/24 are found in [IANA registry iana-ipv4-special-registry].
192.88.99.0/24 reserved for 6to4 Relay Anycast [RFC3068]
Complete registration details for 192.88.99.0/24 are found in [IANA registry iana-ipv4-special-registry].
192.88.99.2/32 reserved for 6a44 Relay Anycast [RFC6751] (possibly collocated with 6to4 Relay 
at 192.88.99.1/32 - see [RFC3068] section 2.4)
192.168.0.0/16 reserved for Private-Use Networks [RFC1918]. 
Complete registration details for 192.168.0.0/16 are found in [IANA registry iana-ipv4-special-registry].
[10]
192.0.0.0/24 reserved for IANA IPv4 Special Purpose Address Registry [RFC5736]. 
Complete registration details for 192.0.0.0/24 are found in [IANA registry iana-ipv4-special-registry].
[11]
198.18.0.0/15 reserved for Network Interconnect Device Benchmark Testing [RFC2544]. 
Complete registration details for 198.18.0.0/15 are found in [IANA registry iana-ipv4-special-registry].
198.51.100.0/24 reserved for TEST-NET-2 [RFC5737]. 
Complete registration details for 198.51.100.0/24 are found in [IANA registry iana-ipv4-special-registry].
[12]
203.0.113.0/24 reserved for TEST-NET-3 [RFC5737]. 
Complete registration details for 203.0.113.0/24 are found in [IANA registry iana-ipv4-special-registry].
[13]
Multicast (formerly "Class D") [RFC5771] registered in [IANA registry multicast-addresses]
[14]
Unicast-Prefix-Based IPv4 Multicast Addresses [RFC6034]
[15]
Administratively Scoped IP Multicast [RFC2365]
[16]
Reserved for future use (formerly "Class E") [RFC1112].
Reserved by protocol. For authoritative registration, see [IANA registry iana-ipv4-special-registry].
[17]
255.255.255.255 is reserved for "limited broadcast" destination address [RFC919] and [RFC922].
Complete registration details for 255.255.255.255/32 are found in [IANA registry iana-ipv4-special-registry].