保留ip:　Reserved IP addresses

Posted 2020-08-23

 

Reserved IP addresses

From Wikipedia, the free encyclopedia

 

 

In the Internet addressing architecture, the Internet Engineering Task Force (IETF) and the Internet Assigned Numbers Authority (IANA) have reserved various Internet Protocol (IP) addresses for special purposes.

 

 

Contents

  [hide] 

• 1IPv4
• 2IPv6
• 3See also
• 4References
• 5External links

 

IPv4[edit]

Address block (CIDR)	Range	Number of addresses	Scope	Purpose
0.0.0.0/8	0.0.0.0 – 0.255.255.255	16,777,216	Software	Used for broadcast messages to the current ("this")[1]
10.0.0.0/8	10.0.0.0 – 10.255.255.255	16,777,216	Private network	Used for local communications within a private network[2]
100.64.0.0/10	100.64.0.0 – 100.127.255.255	4,194,304	Private network	Used for communications between a service provider and its subscribers when using a carrier-grade NAT[3]
127.0.0.0/8	127.0.0.0 – 127.255.255.255	16,777,216	Host	Used for loopback addresses to the local host[4]
169.254.0.0/16	169.254.0.0 – 169.254.255.255	65,536	Subnet	Used for link-local addresses between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server[5]
172.16.0.0/12	172.16.0.0 – 172.31.255.255	1,048,576	Private network	Used for local communications within a private network[2]
192.0.0.0/24	192.0.0.0 – 192.0.0.255	256	Private network	Used for the IANA IPv4 Special Purpose Address Registry[6]
192.0.2.0/24	192.0.2.0 – 192.0.2.255	256	Documentation	Assigned as "TEST-NET" for use in documentation and examples. It should not be used publicly.[7]
192.88.99.0/24	192.88.99.0 – 192.88.99.255	256	Internet	Used by 6to4 anycast relays[8]
192.168.0.0/16	192.168.0.0 – 192.168.255.255	65,536	Private network	Used for local communications within a private network[2]
198.18.0.0/15	198.18.0.0 – 198.19.255.255	131,072	Private network	Used for testing of inter-network communications between two separate subnets[9]
198.51.100.0/24	198.51.100.0 – 198.51.100.255	256	Documentation	Assigned as "TEST-NET-2" for use in documentation and examples. It should not be used publicly.[7]
203.0.113.0/24	203.0.113.0 – 203.0.113.255	256	Documentation	Assigned as "TEST-NET-3" for use in documentation and examples. It should not be used publicly.[7]
224.0.0.0/4	224.0.0.0 – 239.255.255.255	268,435,455	Internet	Reserved for muticast[10]
240.0.0.0/4	240.0.0.0 – 255.255.255.254	268,435,455	Internet	Reserved for future use[11]
255.255.255.255/32	255.255.255.255	1	Subnet	Reserved for the "limited broadcast" destination address[11]

IPv6[edit]

Address block (CIDR)	Range	Number of addresses	Scope	Purpose
::/128	::	1	Software	Unspecified address
::1/128	::1	1	Host	Loopback address to the local host.
::ffff:0:0/96	::ffff:0.0.0.0 – ::ffff:255.255.255.255	232	Software	IPv4 mapped addresses
100::/64	100:: – 100::ffff:ffff:ffff:ffff	264		Discard prefix RFC 6666
64:ff9b::/96	64:ff9b::0.0.0.0 – 64:ff9b::255.255.255.255	232	Global Internet[12]	IPv4/IPv6 translation (RFC 6052)
2001::/32	2001:: – 2001::ffff:ffff:ffff:ffff:ffff:ffff	296	Global	Teredo tunneling
2001:10::/28	2001:10:: – 2001:1f:ffff:ffff:ffff:ffff:ffff:ffff	2100	Software	Deprecated (previously ORCHID)
2001:20::/28	2001:20:: – 2001:2f:ffff:ffff:ffff:ffff:ffff:ffff	2100	Software	ORCHIDv2
2001:db8::/32	2001:db8:: – 2001:db8:ffff:ffff:ffff:ffff:ffff:ffff	296	Documentation	Addresses used in documentation and example source code
2002::/16	2002:: – 2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff	2112	Global Internet	6to4
fc00::/7	fc00:: – fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff	2121	Private network	Unique local address
fe80::/10	fe80:: – febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff	2118	Link	Link-local address
ff00::/8	ff00:: – ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff	2120	Global Internet	Multicast address