Allocations to RIRs are made in line with the Global Policy publishedhere. All other assignments require IETF Review.

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.

Prefix Designation Date WHOIS RDAP Status
000/8 IANA - Local Identification 1981-09 RESERVED
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 Administered by ARIN 1994-05 whois.arin.net https://rdap.arin.net/registry LEGACY
004/8 Level 3 Parent, LLC 1992-12 whois.arin.net https://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 LEGACY
007/8 Administered by ARIN 1995-04 whois.arin.net https://rdap.arin.net/registry LEGACY
008/8 Administered by ARIN 1992-12 whois.arin.net https://rdap.arin.net/registry LEGACY
009/8 Administered by ARIN 1992-08 whois.arin.net https://rdap.arin.net/registry LEGACY
010/8 IANA - Private Use 1995-06 RESERVED
011/8 DoD Intel Information Systems 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
012/8 AT&T Bell Laboratories 1995-06 whois.arin.net https://rdap.arin.net/registry LEGACY
013/8 Administered by ARIN 1991-09 whois.arin.net https://rdap.arin.net/registry LEGACY
014/8 APNIC 2010-04 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
015/8 Administered by ARIN 1994-07 whois.arin.net https://rdap.arin.net/registry LEGACY
016/8 Administered by ARIN 1994-11 whois.arin.net https://rdap.arin.net/registry LEGACY
017/8 Apple Computer Inc. 1992-07 whois.arin.net https://rdap.arin.net/registry LEGACY
018/8 Administered by ARIN 1994-01 whois.arin.net https://rdap.arin.net/registry LEGACY
019/8 Ford Motor Company 1995-05 whois.arin.net https://rdap.arin.net/registry LEGACY
020/8 Administered by ARIN 1994-10 whois.arin.net https://rdap.arin.net/registry LEGACY
021/8 DDN-RVN 1991-07 whois.arin.net https://rdap.arin.net/registry LEGACY
022/8 Defense Information Systems Agency 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
023/8 ARIN 2010-11 whois.arin.net https://rdap.arin.net/registry ALLOCATED
024/8 ARIN 2001-05 whois.arin.net https://rdap.arin.net/registry ALLOCATED
025/8 Administered by RIPE NCC 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 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 LEGACY
029/8 Defense Information Systems Agency 1991-07 whois.arin.net https://rdap.arin.net/registry LEGACY
030/8 Defense Information Systems Agency 1991-07 whois.arin.net https://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 LEGACY
033/8 DLA Systems Automation Center 1991-01 whois.arin.net https://rdap.arin.net/registry LEGACY
034/8 Administered by ARIN 1993-03 whois.arin.net https://rdap.arin.net/registry LEGACY
035/8 Administered by ARIN 1994-04 whois.arin.net https://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 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 LEGACY
041/8 AFRINIC 2005-04 whois.afrinic.net https://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 LEGACY
045/8 Administered by ARIN 1995-01 whois.arin.net https://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 LEGACY
048/8 Prudential Securities Inc. 1995-05 whois.arin.net https://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 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 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 LEGACY
055/8 DoD Network Information Center 1995-04 whois.arin.net https://rdap.arin.net/registry LEGACY
056/8 US Postal Service 1994-06 whois.arin.net https://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 ALLOCATED
064/8 ARIN 1999-07 whois.arin.net https://rdap.arin.net/registry ALLOCATED
065/8 ARIN 2000-07 whois.arin.net https://rdap.arin.net/registry ALLOCATED
066/8 ARIN 2000-07 whois.arin.net https://rdap.arin.net/registry ALLOCATED
067/8 ARIN 2001-05 whois.arin.net https://rdap.arin.net/registry ALLOCATED
068/8 ARIN 2001-06 whois.arin.net https://rdap.arin.net/registry ALLOCATED
069/8 ARIN 2002-08 whois.arin.net https://rdap.arin.net/registry ALLOCATED
070/8 ARIN 2004-01 whois.arin.net https://rdap.arin.net/registry ALLOCATED
071/8 ARIN 2004-08 whois.arin.net https://rdap.arin.net/registry ALLOCATED
072/8 ARIN 2004-08 whois.arin.net https://rdap.arin.net/registry ALLOCATED
073/8 ARIN 2005-03 whois.arin.net https://rdap.arin.net/registry ALLOCATED
074/8 ARIN 2005-06 whois.arin.net https://rdap.arin.net/registry ALLOCATED
075/8 ARIN 2005-06 whois.arin.net https://rdap.arin.net/registry ALLOCATED
076/8 ARIN 2005-06 whois.arin.net https://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 ALLOCATED
097/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry ALLOCATED
098/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry ALLOCATED
099/8 ARIN 2006-10 whois.arin.net https://rdap.arin.net/registry ALLOCATED
100/8 ARIN 2010-11 whois.arin.net https://rdap.arin.net/registry ALLOCATED
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/ 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 ALLOCATED
105/8 AFRINIC 2010-11 whois.afrinic.net https://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 ALLOCATED
108/8 ARIN 2008-12 whois.arin.net https://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
128/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
129/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
130/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
131/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
132/8 Administered by ARIN 1993-05 whois.arin.net https://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 LEGACY
135/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
136/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
137/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
138/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
139/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
140/8 Administered by ARIN 1993-05 whois.arin.net https://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 LEGACY
143/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
144/8 Administered by ARIN 1993-05 whois.arin.net https://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 LEGACY
147/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
148/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
149/8 Administered by ARIN 1993-05 whois.arin.net https://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 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/ LEGACY
155/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
156/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
157/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
158/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
159/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
160/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
161/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
162/8 Administered by ARIN 1993-05 whois.arin.net https://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 LEGACY
165/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
166/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
167/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
168/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
169/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
170/8 Administered by ARIN 1993-05 whois.arin.net https://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 LEGACY
173/8 ARIN 2008-02 whois.arin.net https://rdap.arin.net/registry ALLOCATED
174/8 ARIN 2008-02 whois.arin.net https://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 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 LEGACY
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/ LEGACY
197/8 AFRINIC 2008-10 whois.afrinic.net https://rdap.afrinic.net/rdap/ ALLOCATED
198/8 Administered by ARIN 1993-05 whois.arin.net https://rdap.arin.net/registry LEGACY
199/8 ARIN 1993-05 whois.arin.net https://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
204/8 ARIN 1994-03 whois.arin.net https://rdap.arin.net/registry ALLOCATED
205/8 ARIN 1994-03 whois.arin.net https://rdap.arin.net/registry ALLOCATED
206/8 ARIN 1995-04 whois.arin.net https://rdap.arin.net/registry ALLOCATED
207/8 ARIN 1995-11 whois.arin.net https://rdap.arin.net/registry ALLOCATED
208/8 ARIN 1996-04 whois.arin.net https://rdap.arin.net/registry ALLOCATED
209/8 ARIN 1996-06 whois.arin.net https://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 LEGACY
215/8 US-DOD 1998-03 whois.arin.net https://rdap.arin.net/registry LEGACY
216/8 ARIN 1998-04 whois.arin.net https://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
225/8 Multicast 1981-09 RESERVED
226/8 Multicast 1981-09 RESERVED
227/8 Multicast 1981-09 RESERVED
228/8 Multicast 1981-09 RESERVED
229/8 Multicast 1981-09 RESERVED
230/8 Multicast 1981-09 RESERVED
231/8 Multicast 1981-09 RESERVED
232/8 Multicast 1981-09 RESERVED
233/8 Multicast 1981-09 RESERVED
234/8 Multicast 1981-09 RESERVED
235/8 Multicast 1981-09 RESERVED
236/8 Multicast 1981-09 RESERVED
237/8 Multicast 1981-09 RESERVED
238/8 Multicast 1981-09 RESERVED
239/8 Multicast 1981-09 RESERVED
240/8 Future use 1981-09 RESERVED
241/8 Future use 1981-09 RESERVED
242/8 Future use 1981-09 RESERVED
243/8 Future use 1981-09 RESERVED
244/8 Future use 1981-09 RESERVED
245/8 Future use 1981-09 RESERVED
246/8 Future use 1981-09 RESERVED
247/8 Future use 1981-09 RESERVED
248/8 Future use 1981-09 RESERVED
249/8 Future use 1981-09 RESERVED
250/8 Future use 1981-09 RESERVED
251/8 Future use 1981-09 RESERVED
252/8 Future use 1981-09 RESERVED
253/8 Future use 1981-09 RESERVED
254/8 Future use 1981-09 RESERVED
255/8 Future use 1981-09 RESERVED
Allocations to RIRs are made in line with the Global Policy publishedhere. All other assignments require IETF Review.

The allocation of Internet Protocol version 6 (IPv6) unicast address space is listed here. References to the various other registries detailing the use of the IPv6 address space can be found in the [IPv6 Address Space registry].

Prefix Designation Date WHOIS RDAP Status
2001:0000::/23 IANA 1999-07-01 whois.iana.org ALLOCATED
2001:0200::/23 APNIC 1999-07-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2001:0400::/23 ARIN 1999-07-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
2001:0600::/23 RIPE NCC 1999-07-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:0800::/23 RIPE NCC 2002-05-02 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:0a00::/23 RIPE NCC 2002-11-02 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:0c00::/23 APNIC 2002-05-02 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2001:0e00::/23 APNIC 2003-01-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2001:1200::/23 LACNIC 2002-11-01 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
2001:1400::/23 RIPE NCC 2003-02-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:1600::/23 RIPE NCC 2003-07-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:1800::/23 ARIN 2003-04-01 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
2001:1a00::/23 RIPE NCC 2004-01-01 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:1c00::/22 RIPE NCC 2004-05-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:2000::/20 RIPE NCC 2004-05-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:3000::/21 RIPE NCC 2004-05-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:3800::/22 RIPE NCC 2004-05-04 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:3c00::/22 RIPE NCC 2019-03-12 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:4000::/23 RIPE NCC 2004-06-11 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:4200::/23 AFRINIC 2004-06-01 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
ALLOCATED
2001:4400::/23 APNIC 2004-06-11 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2001:4600::/23 RIPE NCC 2004-08-17 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:4800::/23 ARIN 2004-08-24 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
2001:4a00::/23 RIPE NCC 2004-10-15 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:4c00::/23 RIPE NCC 2004-12-17 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:5000::/20 RIPE NCC 2004-09-10 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2001:8000::/19 APNIC 2004-11-30 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2001:a000::/20 APNIC 2004-11-30 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2001:b000::/20 APNIC 2006-03-08 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2002:0000::/16 6to4 2001-02-01 ALLOCATED
2003:0000::/18 RIPE NCC 2005-01-12 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2400:0000::/12 APNIC 2006-10-03 whois.apnic.net https://rdap.apnic.net/ ALLOCATED
2600:0000::/12 ARIN 2006-10-03 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
2610:0000::/23 ARIN 2005-11-17 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
2620:0000::/23 ARIN 2006-09-12 whois.arin.net https://rdap.arin.net/registry
http://rdap.arin.net/registry
ALLOCATED
2800:0000::/12 LACNIC 2006-10-03 whois.lacnic.net https://rdap.lacnic.net/rdap/ ALLOCATED
2a00:0000::/12 RIPE NCC 2006-10-03 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED
2c00:0000::/12 AFRINIC 2006-10-03 whois.afrinic.net https://rdap.afrinic.net/rdap/
http://rdap.afrinic.net/rdap/
ALLOCATED
2d00:0000::/8 IANA 1999-07-01 RESERVED
2e00:0000::/7 IANA 1999-07-01 RESERVED
3000:0000::/4 IANA 1999-07-01 RESERVED
3ffe::/16 IANA 2008-04 RESERVED
5f00::/8 IANA 2008-04 RESERVED