| Address Block |
Present Use |
Reference |
| 0.0.0.0/8 |
“This” Network |
RFC 1122, Section 3.2.1.3 |
| 10.0.0.0/8 |
Private-Use Networks |
RFC 1918 |
| 127.0.0.0/8 |
Loopback |
RFC 1122, Section 3.2.1.3 |
| 169.254.0.0/16 |
Link Local |
RFC 3927 |
| 172.16.0.0/12 |
Private-Use Networks |
RFC 1918 |
| 192.0.0.0/24 |
IETF Protocol Assignments |
RFC 5736 |
| 192.0.2.0/24 |
TEST-NET-1 |
RFC 5737 |
| 192.88.99.0/24 |
6to4 Relay Anycast |
RFC 3068 |
| 192.168.0.0/16 |
Private-Use Networks |
RFC 1918 |
| 198.18.0.0/15 |
Network Interconnect |
RFC 2544 |
| |
Device Benchmark Testing |
RFC 2544 |
| 198.51.100.0/24 |
TEST-NET-2 |
RFC 5737 |
| 203.0.113.0/24 |
TEST-NET-3 |
RFC 5737 |
| 224.0.0.0/4 |
Multicast |
RFC 3171 |
| 240.0.0.0/4 |
Reserved for Future Use |
RFC 1112, Section 4 |
| 255.255.255.255/32 |
Limited Broadcast |
RFC 919, Section 7 |
| |
|
RFC 922, Section 7 |