IPv4 Address Space

Complete IPv4 address space allocation from IANA with RIR assignments.

PrefixDesignationDateStatus
000/8IANA - Local Identification1981-09RESERVED
001/8APNIC2010-01ALLOCATED
002/8RIPE NCC2009-09ALLOCATED
003/8Administered by ARIN1994-05LEGACY
004/8Administered by ARIN1992-12LEGACY
005/8RIPE NCC2010-11ALLOCATED
006/8Army Information Systems Center1994-02LEGACY
007/8Administered by ARIN1995-04LEGACY
008/8Administered by ARIN1992-12LEGACY
009/8Administered by ARIN1992-08LEGACY
010/8IANA - Private Use1995-06RESERVED
011/8DoD Intel Information Systems1993-05LEGACY
012/8AT&T Bell Laboratories1995-06LEGACY
013/8Administered by ARIN1991-09LEGACY
014/8APNIC2010-04ALLOCATED
015/8Administered by ARIN1994-07LEGACY
016/8Administered by ARIN1994-11LEGACY
017/8Apple Computer Inc.1992-07LEGACY
018/8Administered by ARIN1994-01LEGACY
019/8Ford Motor Company1995-05LEGACY
020/8Administered by ARIN1994-10LEGACY
021/8DDN-RVN1991-07LEGACY
022/8Defense Information Systems Agency1993-05LEGACY
023/8ARIN2010-11ALLOCATED
024/8ARIN2001-05ALLOCATED
025/8Administered by RIPE NCC1995-01LEGACY
026/8Defense Information Systems Agency1995-05LEGACY
027/8APNIC2010-01ALLOCATED
028/8DSI-North1992-07LEGACY
029/8Defense Information Systems Agency1991-07LEGACY
030/8Defense Information Systems Agency1991-07LEGACY
031/8RIPE NCC2010-05ALLOCATED
032/8Administered by ARIN1994-06LEGACY
033/8DLA Systems Automation Center1991-01LEGACY
034/8Administered by ARIN1993-03LEGACY
035/8Administered by ARIN1994-04LEGACY
036/8APNIC2010-10ALLOCATED
037/8RIPE NCC2010-11ALLOCATED
038/8PSINet, Inc.1994-09LEGACY
039/8APNIC2011-01ALLOCATED
040/8Administered by ARIN1994-06LEGACY
041/8AFRINIC2005-04ALLOCATED
042/8APNIC2010-10ALLOCATED
043/8Administered by APNIC1991-01LEGACY
044/8Administered by ARIN1992-07LEGACY
045/8Administered by ARIN1995-01LEGACY
046/8RIPE NCC2009-09ALLOCATED
047/8Administered by ARIN1991-01LEGACY
048/8Administered by ARIN1995-05LEGACY
049/8APNIC2010-08ALLOCATED
050/8ARIN2010-02ALLOCATED
051/8Administered by RIPE NCC1994-08LEGACY
052/8Administered by ARIN1991-12LEGACY
053/8Daimler AG1993-10LEGACY
054/8Administered by ARIN1992-03LEGACY
055/8DoD Network Information Center1995-04LEGACY
056/8Administered by ARIN1994-06LEGACY
057/8Administered by RIPE NCC1995-05LEGACY
058/8APNIC2004-04ALLOCATED
059/8APNIC2004-04ALLOCATED
060/8APNIC2003-04ALLOCATED
061/8APNIC1997-04ALLOCATED
062/8RIPE NCC1997-04ALLOCATED
063/8ARIN1997-04ALLOCATED
064/8ARIN1999-07ALLOCATED
065/8ARIN2000-07ALLOCATED
066/8ARIN2000-07ALLOCATED
067/8ARIN2001-05ALLOCATED
068/8ARIN2001-06ALLOCATED
069/8ARIN2002-08ALLOCATED
070/8ARIN2004-01ALLOCATED
071/8ARIN2004-08ALLOCATED
072/8ARIN2004-08ALLOCATED
073/8ARIN2005-03ALLOCATED
074/8ARIN2005-06ALLOCATED
075/8ARIN2005-06ALLOCATED
076/8ARIN2005-06ALLOCATED
077/8RIPE NCC2006-08ALLOCATED
078/8RIPE NCC2006-08ALLOCATED
079/8RIPE NCC2006-08ALLOCATED
080/8RIPE NCC2001-04ALLOCATED
081/8RIPE NCC2001-04ALLOCATED
082/8RIPE NCC2002-11ALLOCATED
083/8RIPE NCC2003-11ALLOCATED
084/8RIPE NCC2003-11ALLOCATED
085/8RIPE NCC2004-04ALLOCATED
086/8RIPE NCC2004-04ALLOCATED
087/8RIPE NCC2004-04ALLOCATED
088/8RIPE NCC2004-04ALLOCATED
089/8RIPE NCC2005-06ALLOCATED
090/8RIPE NCC2005-06ALLOCATED
091/8RIPE NCC2005-06ALLOCATED
092/8RIPE NCC2007-03ALLOCATED
093/8RIPE NCC2007-03ALLOCATED
094/8RIPE NCC2007-07ALLOCATED
095/8RIPE NCC2007-07ALLOCATED
096/8ARIN2006-10ALLOCATED
097/8ARIN2006-10ALLOCATED
098/8ARIN2006-10ALLOCATED
099/8ARIN2006-10ALLOCATED
100/8ARIN2010-11ALLOCATED
101/8APNIC2010-08ALLOCATED
102/8AFRINIC2011-02ALLOCATED
103/8APNIC2011-02ALLOCATED
104/8ARIN2011-02ALLOCATED
105/8AFRINIC2010-11ALLOCATED
106/8APNIC2011-01ALLOCATED
107/8ARIN2010-02ALLOCATED
108/8ARIN2008-12ALLOCATED
109/8RIPE NCC2009-01ALLOCATED
110/8APNIC2008-11ALLOCATED
111/8APNIC2008-11ALLOCATED
112/8APNIC2008-05ALLOCATED
113/8APNIC2008-05ALLOCATED
114/8APNIC2007-10ALLOCATED
115/8APNIC2007-10ALLOCATED
116/8APNIC2007-01ALLOCATED
117/8APNIC2007-01ALLOCATED
118/8APNIC2007-01ALLOCATED
119/8APNIC2007-01ALLOCATED
120/8APNIC2007-01ALLOCATED
121/8APNIC2006-01ALLOCATED
122/8APNIC2006-01ALLOCATED
123/8APNIC2006-01ALLOCATED
124/8APNIC2005-01ALLOCATED
125/8APNIC2005-01ALLOCATED
126/8APNIC2005-01ALLOCATED
127/8IANA - Loopback1981-09RESERVED
128/8Administered by ARIN1993-05LEGACY
129/8Administered by ARIN1993-05LEGACY
130/8Administered by ARIN1993-05LEGACY
131/8Administered by ARIN1993-05LEGACY
132/8Administered by ARIN1993-05LEGACY
133/8Administered by APNIC1997-03LEGACY
134/8Administered by ARIN1993-05LEGACY
135/8Administered by ARIN1993-05LEGACY
136/8Administered by ARIN1993-05LEGACY
137/8Administered by ARIN1993-05LEGACY
138/8Administered by ARIN1993-05LEGACY
139/8Administered by ARIN1993-05LEGACY
140/8Administered by ARIN1993-05LEGACY
141/8Administered by RIPE NCC1993-05LEGACY
142/8Administered by ARIN1993-05LEGACY
143/8Administered by ARIN1993-05LEGACY
144/8Administered by ARIN1993-05LEGACY
145/8Administered by RIPE NCC1993-05LEGACY
146/8Administered by ARIN1993-05LEGACY
147/8Administered by ARIN1993-05LEGACY
148/8Administered by ARIN1993-05LEGACY
149/8Administered by ARIN1993-05LEGACY
150/8Administered by APNIC1993-05LEGACY
151/8Administered by RIPE NCC1993-05LEGACY
152/8Administered by ARIN1993-05LEGACY
153/8Administered by APNIC1993-05LEGACY
154/8Administered by AFRINIC1993-05LEGACY
155/8Administered by ARIN1993-05LEGACY
156/8Administered by ARIN1993-05LEGACY
157/8Administered by ARIN1993-05LEGACY
158/8Administered by ARIN1993-05LEGACY
159/8Administered by ARIN1993-05LEGACY
160/8Administered by ARIN1993-05LEGACY
161/8Administered by ARIN1993-05LEGACY
162/8Administered by ARIN1993-05LEGACY
163/8Administered by APNIC1993-05LEGACY
164/8Administered by ARIN1993-05LEGACY
165/8Administered by ARIN1993-05LEGACY
166/8Administered by ARIN1993-05LEGACY
167/8Administered by ARIN1993-05LEGACY
168/8Administered by ARIN1993-05LEGACY
169/8Administered by ARIN1993-05LEGACY
170/8Administered by ARIN1993-05LEGACY
171/8Administered by APNIC1993-05LEGACY
172/8Administered by ARIN1993-05LEGACY
173/8ARIN2008-02ALLOCATED
174/8ARIN2008-02ALLOCATED
175/8APNIC2009-08ALLOCATED
176/8RIPE NCC2010-05ALLOCATED
177/8LACNIC2010-06ALLOCATED
178/8RIPE NCC2009-01ALLOCATED
179/8LACNIC2011-02ALLOCATED
180/8APNIC2009-04ALLOCATED
181/8LACNIC2010-06ALLOCATED
182/8APNIC2009-08ALLOCATED
183/8APNIC2009-04ALLOCATED
184/8ARIN2008-12ALLOCATED
185/8RIPE NCC2011-02ALLOCATED
186/8LACNIC2007-09ALLOCATED
187/8LACNIC2007-09ALLOCATED
188/8Administered by RIPE NCC1993-05LEGACY
189/8LACNIC1995-06ALLOCATED
190/8LACNIC1995-06ALLOCATED
191/8Administered by LACNIC1993-05LEGACY
192/8Administered by ARIN1993-05LEGACY
193/8RIPE NCC1993-05ALLOCATED
194/8RIPE NCC1993-05ALLOCATED
195/8RIPE NCC1993-05ALLOCATED
196/8Administered by AFRINIC1993-05LEGACY
197/8AFRINIC2008-10ALLOCATED
198/8Administered by ARIN1993-05LEGACY
199/8ARIN1993-05ALLOCATED
200/8LACNIC2002-11ALLOCATED
201/8LACNIC2003-04ALLOCATED
202/8APNIC1993-05ALLOCATED
203/8APNIC1993-05ALLOCATED
204/8ARIN1994-03ALLOCATED
205/8ARIN1994-03ALLOCATED
206/8ARIN1995-04ALLOCATED
207/8ARIN1995-11ALLOCATED
208/8ARIN1996-04ALLOCATED
209/8ARIN1996-06ALLOCATED
210/8APNIC1996-06ALLOCATED
211/8APNIC1996-06ALLOCATED
212/8RIPE NCC1997-10ALLOCATED
213/8RIPE NCC1993-10ALLOCATED
214/8US-DOD1998-03LEGACY
215/8US-DOD1998-03LEGACY
216/8ARIN1998-04ALLOCATED
217/8RIPE NCC2000-06ALLOCATED
218/8APNIC2000-12ALLOCATED
219/8APNIC2001-09ALLOCATED
220/8APNIC2001-12ALLOCATED
221/8APNIC2002-07ALLOCATED
222/8APNIC2003-02ALLOCATED
223/8APNIC2010-04ALLOCATED
224/8Multicast1981-09RESERVED
225/8Multicast1981-09RESERVED
226/8Multicast1981-09RESERVED
227/8Multicast1981-09RESERVED
228/8Multicast1981-09RESERVED
229/8Multicast1981-09RESERVED
230/8Multicast1981-09RESERVED
231/8Multicast1981-09RESERVED
232/8Multicast1981-09RESERVED
233/8Multicast1981-09RESERVED
234/8Multicast1981-09RESERVED
235/8Multicast1981-09RESERVED
236/8Multicast1981-09RESERVED
237/8Multicast1981-09RESERVED
238/8Multicast1981-09RESERVED
239/8Multicast1981-09RESERVED
240/8Future use1981-09RESERVED
241/8Future use1981-09RESERVED
242/8Future use1981-09RESERVED
243/8Future use1981-09RESERVED
244/8Future use1981-09RESERVED
245/8Future use1981-09RESERVED
246/8Future use1981-09RESERVED
247/8Future use1981-09RESERVED
248/8Future use1981-09RESERVED
249/8Future use1981-09RESERVED
250/8Future use1981-09RESERVED
251/8Future use1981-09RESERVED
252/8Future use1981-09RESERVED
253/8Future use1981-09RESERVED
254/8Future use1981-09RESERVED
255/8Future use1981-09RESERVED

About IPv4 Address Space

Complete IPv4 address space allocation from IANA with RIR assignments.

IPv4 Address Space inspects network details from your browser — enter a host, address or URL and get clear, readable results without touching the command line.

How to Use IPv4 Address Space

  1. Enter the host, IP address, URL or port you want to inspect.
  2. Choose any options the tool offers (protocol, count, depth).
  3. Run the check — results appear as the browser completes the request.
  4. Copy the report or note down the details you need.

Key Features

  • No terminal or admin tools needed — everything happens in the page.
  • Clear, readable results instead of raw command output.
  • Checks run from your browser, reflecting what a real visitor experiences.

Frequently Asked Questions

Does IPv4 Address Space really check the network?

Yes — IPv4 Address Space uses browser-based requests and lookups to test reachability the way a real visitor would experience it.

Is IPv4 Address Space free to use?

Yes. IPv4 Address Space is completely free with unlimited use — no account, download or payment required.

Is my data uploaded to a server?

No. IPv4 Address Space runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.

Does IPv4 Address Space work on mobile?

Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.

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