https://en.wikipedia.org/wiki/Reserved_IP_addresses
https://blog.csdn.net/tty521/article/details/72566150
''' 地址块（CIDR） 范围 地址数量 范围 目的 0.0.0.0/8 0.0.0.0-0.255.255.255 16777216 软件 用于广播消息到当前（“this”）[1] 10.0.0.0/8 10.0.0.0-10.255.255.255 16777216 专网 用于专网内的本地通信[2] 100.64.0.0/10 100.64.0.0-100.127.255.255 4,194,304 专网 用于运营商级NAT[3]时服务提供商与其订户之间的通信 127.0.0.0/8 127.0.0.0-127.255.255.255 16777216 主办 用于本地主机的环回地址[4] 169.254.0.0/16 169.254.0.0-169.254.255.255 65536 子网 用于单个链路上两个主机之间的链路本地地址，如果没有指定IP地址，例如通常会从DHCP服务器检索[5] 172.16.0.0/12 172.16.0.0-172.31.255.255 1,048,576 专网 用于专网内的本地通信[2] 192.0.0.0/24 192.0.0.0-192.0.0.255 256 专网 用于IANA IPv4专用地址注册表[6] 192.0.2.0/24 192.0.2.0-192.0.2.255 256 文档 分配为“TEST-NET”用于文档和示例。不应该被公开使用。[7] 192.88.99.0/24 192.88.99.0-192.88.99.255 256 互联网 由6to4任意继电器使用[8] 192.168.0.0/16 192.168.0.0-192.168.255.255 65536 专网 用于专网内的本地通信[2] 198.18.0.0/15 198.18.0.0-198.19.255.255 131,072 专网 用于测试两个单独子网之间的网络间通信[9] 198.51.100.0/24 198.51.100.0-198.51.100.255 256 文档 被分配为“TEST-NET-2”用于文档和示例。不应该被公开使用。[7] 203.0.113.0/24 203.0.113.0-203.0.113.255 256 文档 分配为“TEST-NET-3”用于文档和示例。不应该被公开使用。[7] 224.0.0.0/4 224.0.0.0-239.255.255.255 268435456 互联网 保留为组播[10] 240.0.0.0/4 240.0.0.0-255.255.255.254 268435456 互联网 保留供将来使用[11] 255.255.255.255/32 255.255.255.255 1 子网 保留为“有限广播”目的地址[11] 英文描述 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 –239.255.255.255 268,435,456 Internet Reserved for multicast[10] 240.0.0.0/4 240.0.0.0 –255.255.255.254 268,435,456 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] '''
