/32 Subnet Mask Reference (255.255.255.255)
Single host route, loopback interface, or exact firewall /32 allowlist rule.
| CIDR Prefix | /32 |
|---|---|
| Subnet Mask | 255.255.255.255 |
| Wildcard Mask (Cisco / ACL) | 0.0.0.0 |
| Total IPv4 Addresses | 1 |
| Usable Host IPs | 1 |
| Binary Subnet Mask | 11111111.11111111.11111111.11111111 |
| Example Block (10.0.0.0/32) | 10.0.0.0 – 10.0.0.0 |
| Example Usable Hosts | 10.0.0.0 – 10.0.0.0 |
Need to compute custom IP ranges? Try the Interactive Subnet Calculator or VLSM Splitter.