IPv4 address reservations
Following table lists some important IPv4 address reservations. Please note that there are some other reservations also, apart from below table.
| Address block | Address range | Reservation purpose |
|---|---|---|
| 0.0.0.0/32 | 0.0.0.0 | All IPv4 addresses on the local machine |
| 0.0.0.0/0 | 0.0.0.0 | Default route |
| 0.0.0.0/8 | 0.0.0.0 to 0.255.255.255 |
Self-identification reservation |
| 10.0.0.0/8 | 10.0.0.0 to 10.255.255.255 |
Private IPv4address reservation (Class A) |
| 127.0.0.0/8 | 127.0.0.0 to 127.255.255.255 |
IPv4 loopback address reservation |
| 169.254.0.0/16 | 169.254.0.0 to 169.254.255.255 |
Automatic Private IP Address (APIPA) reservation |
| 172.16.0.0/12 | 172.16.0.0 to 172.31.255.255 |
Private IPv4 address reservation (Class B) |
| 192.0.0.0/24 | 192.0.0.0 to 192.0.0.255 |
IETF Protocol Assignments reservation |
| 192.168.0.0/16 | 192.168.0.0 to 192.168.255.255 |
Private IPv4 address reservation (Class C) |
| 198.18.0.0/15 | 198.18.0.0 to 198.19.255.255 |
Benchmark testing reservation |
| 224.0.0.0/4 | 224.0.0.0 to 239.255.255.255 |
IPv4 multicast address reservation |
| 240.0.0.0/4 | 240.0.0.0 to 255.255.255.254 |
Class E reservation |
| 255.255.255.255/32 | 255.255.255.255 | Limited broadcast IPv4 address reservation |
