Address block |
Address range |
Number of addresses |
Scope |
Description |
0.0.0.0/8 |
0.0.0.0–0.255.255.255 |
16777216 |
Software |
Current (local, "this") network[1] |
10.0.0.0/8 |
10.0.0.0–10.255.255.255 |
16777216 |
Private network |
Used for local communications within a private network[3] |
100.64.0.0/10 |
100.64.0.0–100.127.255.255 |
4194304 |
Private network |
Shared address space[4] 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[1] |
169.254.0.0/16 |
169.254.0.0–169.254.255.255 |
65536 |
Subnet |
Used for link-local addresses[5] 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[3] |
192.0.0.0/24 |
192.0.0.0–192.0.0.255 |
256 |
Private network |
IETF Protocol Assignments, DS-Lite (/29)[1] |
192.0.2.0/24 |
192.0.2.0–192.0.2.255 |
256 |
Documentation |
Assigned as TEST-NET-1, documentation and examples[6] |
192.88.99.0/24 |
192.88.99.0–192.88.99.255 |
256 |
Internet |
Reserved.[7] Formerly used for IPv6 to IPv4 relay[8] (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[3] |
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[9] |
198.51.100.0/24 |
198.51.100.0–198.51.100.255 |
256 |
Documentation |
Assigned as TEST-NET-2, documentation and examples[6] |
203.0.113.0/24 |
203.0.113.0–203.0.113.255 |
256 |
Documentation |
Assigned as TEST-NET-3, documentation and examples[6] |
224.0.0.0/4 |
224.0.0.0–239.255.255.255 |
268435456 |
Internet |
In use for multicast[10] (former Class D network) |
233.252.0.0/24 |
233.252.0.0–233.252.0.255 |
256 |
Documentation |
Assigned as MCAST-TEST-NET, documentation and examples (This is part of the above multicast space.)[10][11] |
240.0.0.0/4 |
240.0.0.0–255.255.255.254 |
268435455 |
Internet |
Reserved for future use[12] (former Class E network) |
255.255.255.255/32 |
255.255.255.255 |
1 |
Subnet |
Reserved for the "limited broadcast" destination address[1] |