<s>
Some	O
large	O
/8	B-Protocol
blocks	O
of	O
IPv4	O
addresses	O
,	O
the	O
former	O
Class	B-Protocol
A	I-Protocol
network	O
blocks	O
,	O
are	O
assigned	O
in	O
whole	O
to	O
single	O
organizations	O
or	O
related	O
groups	O
of	O
organizations	O
,	O
either	O
by	O
the	O
Internet	B-Application
Corporation	I-Application
for	I-Application
Assigned	I-Application
Names	I-Application
and	I-Application
Numbers	I-Application
(	O
ICANN	B-Application
)	O
,	O
through	O
the	O
Internet	O
Assigned	O
Numbers	O
Authority	O
(	O
IANA	O
)	O
,	O
or	O
a	O
regional	O
Internet	O
registry	O
.	O
</s>
<s>
Each	O
/8	B-Protocol
block	O
contains	O
256	O
=	O
2	O
=	O
16,777,216	O
addresses	O
,	O
which	O
covers	O
the	O
whole	O
range	O
of	O
the	O
last	O
three	O
delimited	O
segments	O
of	O
an	O
IP	O
address	O
.	O
</s>
<s>
As	O
IPv4	B-Protocol
address	I-Protocol
exhaustion	I-Protocol
has	O
advanced	O
to	O
its	O
final	O
stages	O
,	O
some	O
organizations	O
,	O
such	O
as	O
Stanford	O
University	O
,	O
formerly	O
using	O
36.0.0.0/8	O
,	O
have	O
returned	O
their	O
allocated	O
blocks	O
(	O
in	O
this	O
case	O
to	O
APNIC	O
)	O
to	O
assist	O
in	O
the	O
delay	O
of	O
the	O
exhaustion	O
date	O
.	O
</s>
<s>
10.0.0.0/8	B-Protocol
IANA	O
-	O
Private	O
Use	O
1995-06	O
Reserved	O
for	O
Private	B-Protocol
Networks	I-Protocol
(	O
RFC	B-Protocol
1918	I-Protocol
)	O
.	O
</s>
<s>
127.0.0.0/8	O
IANA	O
-	O
Loopback	B-Protocol
1981-09	O
127.0.0.0/8	O
is	O
reserved	O
for	O
Loopback	B-Protocol
(	O
RFC	O
6890	O
)	O
.	O
</s>
<s>
224.0.0.0/8	O
–	O
239.0.0.0/8	O
Multicast	B-Protocol
1981-09	O
1991-05-22	O
Multicast	B-Protocol
(	O
formerly	O
"	O
Class	B-Protocol
D	I-Protocol
"	O
)	O
(	O
RFC	O
5771	O
)	O
registered	O
in	O
.	O
</s>
<s>
Formerly	O
Bolt	O
Beranek	O
and	O
Newman	O
Inc.	O
,	O
then	O
GTE	O
,	O
then	O
Genuity	O
,	O
then	O
Level	O
3	O
Communications	O
,	O
Inc.9.0.0.0/8ARIN1992	O
-08IBM	O
except	O
for	O
9.9.9.0/24	O
,	O
which	O
is	O
Quad9.13.0.0.0/8ARIN1991	O
-09Various	O
registries	O
(	O
maintained	O
by	O
ARIN	O
)	O
.	O
</s>
<s>
14.0.0.0/8	O
APNIC	O
2010-04	O
Starting	O
1991-06-01	O
,	O
was	O
used	O
to	O
map	O
Public	O
Data	O
Network	O
(	O
X.121	B-Protocol
)	O
addresses	O
to	O
IP	O
addresses	O
.	O
</s>
<s>
44.0.0.0/8	B-Protocol
ARIN	O
1992-07	O
2019-07-18	O
Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.	O
</s>
<s>
was	O
sold	O
to	O
Amazon	B-Application
on	O
2019-07-18	O
.	O
</s>
<s>
61.0.0.0/8	O
APNIC	O
2010-01	O
Formerly	O
IANA	O
-	O
Reserved	O
1981-09.62.0.0.0/8RIPE	O
NCC1997-0463.0.0.0/8ARIN1997-0464.0.0.0/8ARIN1999-0765.0.0.0/8ARIN2000-0766.0.0.0/8ARIN2000-0767.0.0.0/8ARIN2001-0568.0.0.0/8ARIN2001-0669.0.0.0/8ARIN2002-0870.0.0.0/8ARIN2004-0171.0.0.0/8ARIN2004-0872.0.0.0/8ARIN2004-0874.0.0.0/8ARIN2005-0675.0.0.0/8ARIN2005-0676.0.0.0/8ARIN2005-0677.0.0.0/8RIPE	O
NCC2006-0878.0.0.0/8RIPE	O
NCC2006-0879.0.0.0/8RIPE	O
NCC2006-0880.0.0.0/8RIPE	O
NCC2001-0481.0.0.0/8RIPE	O
NCC2001-0482.0.0.0/8RIPE	O
NCC2002-1183.0.0.0/8RIPE	O
NCC2003-1184.0.0.0/8RIPE	O
NCC2003-1185.0.0.0/8RIPE	O
NCC2004-0486.0.0.0/8RIPE	O
NCC2004-0487.0.0.0/8RIPE	O
NCC2004-04	O
88.0.0.0/8	O
RIPE	O
NCC	O
2010-01	O
Formerly	O
IANA	O
-	O
Reserved	O
1981-09.89.0.0.0/8RIPE	O
NCC2005-0690.0.0.0/8RIPE	O
NCC2005-06Except	O
for	O
90.0.0.0/9	O
,	O
which	O
is	O
Orange91.0.0.0/8RIPE	O
NCC2005-0692.0.0.0/8RIPE	O
NCC2007-0393.0.0.0/8RIPE	O
NCC2007-0394.0.0.0/8RIPE	O
NCC2007-0795.0.0.0/8RIPE	O
NCC2007-0796.0.0.0/8ARIN2006-1097.0.0.0/8ARIN2006-1098.0.0.0/8ARIN2006-1099.0.0.0/8ARIN2006-10100.0.0.0/8ARIN2010-11100.64.0.0/10	O
reserved	O
for	O
Carrier-grade	B-Protocol
NAT	I-Protocol
(	O
detailed	O
in	O
)	O
.101.0.0.0/8APNIC2010-08102.0.0.0/8AFRINIC2011-02103.0.0.0/8APNIC2011-02104.0.0.0/8ARIN2011-02105.0.0.0/8AFRINIC2010-11106.0.0.0/8APNIC2011-01107.0.0.0/8ARIN2010-02108.0.0.0/8ARIN2008-12109.0.0.0/8RIPE	O
NCC2009-01110.0.0.0/8APNIC2008	O
-11	O
111.0.0.0/8	O
APNIC	O
2010-01	O
Formerly	O
IANA	O
-	O
Reserved	O
1981-09.112.0.0.0/8APNIC2008-05113.0.0.0/8APNIC2008	O
-05	O
114.0.0.0/8	O
APNIC	O
2010-01	O
Formerly	O
IANA	O
-	O
Reserved	O
1981-09.115.0.0.0/8APNIC2007-10116.0.0.0/8APNIC2007-01117.0.0.0/8APNIC2007-01118.0.0.0/8APNIC2007-01119.0.0.0/8APNIC2007	O
-01	O
120.0.0.0/8	O
APNIC	O
2010-01	O
Formerly	O
IANA	O
-	O
Reserved	O
1981-09.121.0.0.0/8APNIC2006-01122.0.0.0/8APNIC2006-01123.0.0.0/8APNIC2006-01124.0.0.0/8APNIC2005-01125.0.0.0/8APNIC2005-01126.0.0.0/8APNIC2005	O
-01SOFTBANK	O
Corp	O
.	O
128.0.0.0/8	O
ARIN	O
1993-05	O
Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.	O
</s>
<s>
128.0.0.0	O
is	O
the	O
start	O
address	O
of	O
formerly	O
"	O
Class	B-Protocol
B	I-Protocol
"	O
.129.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.130.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.131.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.132.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.133.0.0.0/8APNIC1997-03JPNIC134.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.135.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.136.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.137.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.138.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.139.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.140.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.141.0.0.0/8RIPE	O
NCC1993-05Various	O
registries	O
(	O
Maintained	O
by	O
RIPE	O
NCC	O
)	O
.142.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.143.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.144.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.145.0.0.0/8RIPE	O
NCC1993-05Various	O
registries	O
(	O
Maintained	O
by	O
RIPE	O
NCC	O
)	O
.146.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.147.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.148.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.149.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.150.0.0.0/8APNIC1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
APNIC	O
)	O
.151.0.0.0/8RIPE	O
NCC1993-05Various	O
registries	O
(	O
Maintained	O
by	O
RIPE	O
NCC	O
)	O
.152.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.153.0.0.0/8APNIC1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
APNIC	O
)	O
.154.0.0.0/8AFRINIC1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
AFRINIC	O
)	O
.155.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.156.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.157.0.0.0/8ARIN1993	O
-05Various	O
registries	O
(	O
Maintained	O
by	O
ARIN	O
)	O
.	O
</s>
<s>
169.254.0.0/16	O
(	O
169.254.0.0	O
–	O
169.254.255.255	O
)	O
reserved	O
for	O
link-local	B-Protocol
addressing	I-Protocol
(	O
RFC	O
6890	O
)	O
.	O
</s>
<s>
172.16.0.0/12	B-Protocol
(	O
172.16.0.0	B-Protocol
–	O
172.31.255.255	O
)	O
reserved	O
for	O
private	B-Protocol
networks	I-Protocol
(	O
RFC	B-Protocol
1918	I-Protocol
)	O
.	O
</s>
<s>
192.168.0.0/16	B-Protocol
(	O
192.168.0.0	B-Protocol
–	O
192.168.255.255	O
)	O
reserved	O
for	O
private	B-Protocol
networks	I-Protocol
(	O
RFC	B-Protocol
1918	I-Protocol
)	O
.	O
</s>
<s>
192.0.0.0	O
is	O
the	O
start	O
address	O
of	O
formerly	O
"	O
Class	B-Protocol
C	I-Protocol
"	O
.	O
</s>
<s>
Note	O
that	O
this	O
list	O
may	O
not	O
include	O
current	O
assignments	O
of	O
/8	B-Protocol
blocks	O
to	O
all	O
regional	O
or	O
national	O
Internet	O
registries	O
.	O
</s>
<s>
The	O
original	O
list	O
of	O
IPv4	B-Protocol
address	I-Protocol
blocks	O
can	O
be	O
found	O
in	O
RFC	O
790	O
(	O
J	O
.	O
</s>
