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IPv4保留地址

  IPv4是互联网协议(Internet Protocol)的第四版,是第一个被广泛应用构成互联网技术的基础协议,也是TCP/IP协议族中的核心协议。IPv4地址是由32位二进制数字组成的,也就意味着它最多能提供4,294,967,296(2的32次幂)个地址。在这些地址中,并不是所有地址都在Internet中分配,有一些地址是分配机构直接保留的,保留的原因各不相同,其中大家最熟悉的就是以下三段保留地址了:

  • 10.0.0.0/8
  • 127.16.0.0/12
  • 192.168.0.0/16

  其实,上面这三段地址叫做私有IP地址,只是保留IP地址的一个真子集。下面本站就为大家介绍一下所有的IPv4保留地址。

Address Block(CIDR) Number of addresses Scope Purpose
0.0.0.0/8 16,777,216 Software Used for broadcast messages to the current ("this")
10.0.0.0/8 16,777,216 Private network Used for local communications within a private network
100.64.0.0/10 4,194,304 Private network Used for communications between a service provider and its subscribers when using a carrier-grade NAT
127.0.0.0/8 16,777,216 Host Used for loopback addresses to the local host
169.254.0.0/16 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
172.16.0.0/12 1,048,576 Private network Used for local communications within a private netwoek
192.0.0.0/24 256 Private network Used for the IANA IPv4 special purpose address registry
192.0.2.0/24 256 Documentation Assigned as "TEST-NET-1" for use in documentation and examples. It should not be used publicly.
192.88.99.0/24 256 Internet Used by 6to4 anycast relays (deprecated)
192.168.0.0/16 65,536 Private network Used for local communications within a private nerwork
198.18.0.0/15 131,072 Private network Used for testing if inter-network communications between two separate subnets
198.51.100.0/24 256 Documentation Assigned as "TEST-NET-2" for use in documentation and examples. It should not be used publicly
203.0.113.0/24 256 Documentation Assigned as "TEST-NET-3" for use in documentation and examples. It should net be used publicly
224.0.0.0/4 268,435,456 Internet Reserved for multicast
240.0.0.0/4 268,435,456 Internet Reserved for future use
255.255.255.255/32 1 Subnet Reserved for the "limited broadcast" destination address

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