/32 Subnet Mask (255.255.255.255)
| Prefix | /32 |
|---|---|
| Subnet mask | 255.255.255.255 |
| Wildcard mask | 0.0.0.0 |
| Binary mask | 11111111.11111111.11111111.11111111 |
| Total addresses | 1 |
| Usable hosts | 1 |
| Host bits | 0 |
| Subnets of /32 in a /24 | 256 |
| Block size | 1 address |
e.g. 10.0.0.5/22 or 10.0.0.5 255.255.252.0
| Network address | 192.168.1.0 | |
|---|---|---|
| Broadcast address | None (/32 single host) | |
| First usable host | 192.168.1.0 | |
| Last usable host | 192.168.1.0 | |
| Total addresses | 1 | |
| Usable hosts | 1 (single host) | |
| Subnet mask | 255.255.255.255 | |
| Wildcard mask | 0.0.0.0 | |
| CIDR notation | 192.168.1.0/32 | |
| IP class | Class C (legacy) | |
| Address type | Private (RFC 1918) | |
| IP address (binary) | 11000000.10101000.00000001.00000000 | |
| Subnet mask (binary) | 11111111.11111111.11111111.11111111 |
■ network bits ■ host bits
| Requested hosts | CIDR | First host | Last host | Broadcast | Usable hosts |
|---|
Runs entirely in your browser. Nothing you enter is sent to a server.
What is a /32 subnet?
A /32 subnet uses the first 32 bits of an IPv4 address for the network and leaves 0 bits for hosts. Its subnet mask is 255.255.255.255, and it contains 2⁰ = 1 addresses, of which 1 can be assigned to devices. Typical use: A single host: loopback interfaces, host routes, firewall rules for one IP. Use the subnet calculator above to check any /32 network.
/32 subnet example
For 192.168.1.0/32: a single host address 192.168.1.0, no network or broadcast address, wildcard mask 0.0.0.0.
Frequently asked questions
How many usable IPs are in a /32?
1. A /32 is a single address, so the only IP is the host itself; there is no network or broadcast address.
What is the subnet mask for /32?
255.255.255.255, or 11111111.11111111.11111111.11111111 in binary.
How many /32 subnets are in a /24?
256 (2⁸), because a /32 uses 8 more network bits than a /24.
What is the difference between /32 and /31?
A /31 (255.255.255.254) is twice as large: 2 addresses and 2 usable hosts, spanning two consecutive /32 blocks such as 192.168.1.0–192.168.1.1.