0.0.0.0/8 | 0.0.0.0–0.255.255.255 | 16777216 | Software | Current network (only valid as source address). |
10.0.0.0/8 | 10.0.0.0–10.255.255.255 | 16777216 | Private network | Used for local communications within a private network. |
100.64.0.0/10 | 100.64.0.0–100.127.255.255 | 4194304 | Private network | Shared address space for communications between a service provider and its subscribers when using a carrier-grade NAT. |
127.0.0.0/8 | 127.0.0.0–127.255.255.255 | 16777216 | Host | Used for loopback addresses to the local host. |
169.254.0.0/16 | 169.254.0.0–169.254.255.255 | 65536 | 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 | 172.16.0.0–172.31.255.255 | 1048576 | Private network | Used for local communications within a private network. |
192.0.0.0/24 | 192.0.0.0–192.0.0.255 | 256 | Private network | IETF Protocol Assignments. |
192.0.2.0/24 | 192.0.2.0–192.0.2.255 | 256 | Documentation | Assigned as TEST-NET-1, documentation and examples. |
192.88.99.0/24 | 192.88.99.0–192.88.99.255 | 256 | Internet | Reserved. Formerly used for IPv6 to IPv4 relay (included IPv6 address block 2002::/16). |
192.168.0.0/16 | 192.168.0.0–192.168.255.255 | 65536 | Private network | Used for local communications within a private network. |
198.18.0.0/15 | 198.18.0.0–198.19.255.255 | 131072 | Private network | Used for benchmark testing of inter-network communications between two separate subnets. |
198.51.100.0/24 | 198.51.100.0–198.51.100.255 | 256 | Documentation | Assigned as TEST-NET-2, documentation and examples. |
203.0.113.0/24 | 203.0.113.0–203.0.113.255 | 256 | Documentation | Assigned as TEST-NET-3, documentation and examples. |
224.0.0.0/4 | 224.0.0.0–239.255.255.255 | 268435456 | Internet | In use for IP multicast. (Former Class D network). |
240.0.0.0/4 | 240.0.0.0–255.255.255.254 | 268435455 | Internet | Reserved for future use. (Former Class E network). |
255.255.255.255/32 | 255.255.255.255 | 1 | Subnet | Reserved for the “limited broadcast” destination address. |