                                                       IPv4 Global Unicast Address Assignments

   Last Updated
           2008-11-11

   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.

   This registry is also available in XML and plain text formats.

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

        Indicates the status of address blocks as follows:
        RESERVED: designated by the IETF for specific non-unicast purposes as noted.
        LEGACY: allocated by the central Internet Registry (IR) prior to the Regional Internet Registries
   [1]  (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 [RFC3330]
   [3]  Reserved for Private-Use Networks [RFC1918]
        This was reserved for Public Data Networks [RFC1356]
   [4]  See: http://www.iana.org/assignments/public-data-network-numbers
        It was recovered in February 2008.
   [5]  127.0.0.0/8 is reserved for Loopback [RFC3330]
   [6]  169.254.0.0/16 reserved for Link Local [RFC3330]
   [7]  172.16.0.0/12 reserved for Private-Use Networks [RFC1918]
        192.0.2.0/24  reserved for Test-Net [RFC3330]
   [8]  192.88.99.0/24 reserved for 6to4 Relay Anycast [RFC3068]
        192.168.0.0/16 reserved for Private-Use Networks [RFC1918]
   [9]  198.18.0.0/15 reserved for Network Interconnect Device
        Benchmark Testing [RFC3330]
   [10] Multicast (formerly "Class D") [RFC1700]
        See: http://www.iana.org/assignments/multicast-addresses
   [11] Reserved for future use (formerly "Class E") [RFC1700]
