What is a /32 subnet?
1 usable hosts out of 1 addresses, behind netmask 255.255.255.255.
| Prefix | /32 |
|---|---|
| Netmask | 255.255.255.255 |
| Total addresses | 1 |
| Usable hosts | 1 |
| Example block | 10.0.0.0/32 |
| Usable host range | 10.0.0.0 |
A /32 is a single address. It names one host, and it is what you write in a firewall rule or a route that should match exactly one machine.
256 of them fit inside a /24.
Other subnet sizes
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