/32 subnet
Mask 255.255.255.255 · 1 usable host · 1 address
| Subnet mask | 255.255.255.255 |
|---|---|
| Wildcard mask | 0.0.0.0 |
| Binary mask | 11111111.11111111.11111111.11111111 |
| Network / host bits | 32 / 0 |
| Total addresses | 1 |
| Usable hosts | 1 |
| Per /8 · /16 · /24 | 16,777,216 · 65,536 · 256 |
| Example | 192.168.10.77/32 → network 192.168.10.77, range 192.168.10.77 – 192.168.10.77 |
Where /32 is used
A single host: loopbacks, host routes, firewall rules for one IP.
Block boundaries: a /32 must start at a multiple of 1 addresses, so in the last octet networks start at 0, 1, 2, 3, 4, 5, 6, 7…. Calculate any specific address in the subnet calculator.
Neighbouring prefixes
Questions
How many hosts in a /32?
1 address, a single host.
What is the subnet mask for /32?
255.255.255.255. In binary: 11111111.11111111.11111111.11111111. The wildcard (inverse) mask is 0.0.0.0.