IPv4 Subnet Calculator
Calculate subnets, host ranges, and network addresses instantly
Common Subnet Masks Reference
| CIDR | Subnet Mask | Hosts | Use Case |
|---|---|---|---|
| /8 | 255.0.0.0 | 16,777,214 | Large networks, ISPs |
| /16 | 255.255.0.0 | 65,534 | Enterprise LANs |
| /24 | 255.255.255.0 | 254 | Small offices, VLANs |
| /27 | 255.255.255.224 | 30 | Branch offices |
| /30 | 255.255.255.252 | 2 | Point-to-point links |
| /32 | 255.255.255.255 | 1 | Host route |