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保留ip: Reserved IP addresses
Reserved IP addresses
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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 |
保留ip: Reserved IP addresses
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