Tools › Subnet cheat sheet › /30
/30 subnet: mask and number of hosts
A /30 network has a subnet mask of 255.255.255.252 and 4 total addresses (2 usable hosts).
| Property | Value |
|---|---|
| Prefix | /30 |
| Subnet mask | 255.255.255.252 |
| Wildcard mask | 0.0.0.3 |
| Total addresses | 4 |
| Usable hosts | 2 |
| Equivalent /24 networks | 1/64 of a /24 |
When it is used
4 addresses, 2 usable. The classic point-to-point link between two routers.