| Prefix size | Network mask | Available subnets  | Usable hosts per subnet  | Total usable hosts  | 
|---|---|---|---|---|
| /24 | 255.255.255.0 | 1 | 254 | 254 | 
| /25 | 255.255.255.128 | 2 | 126 | 252 | 
| /26 | 255.255.255.192 | 4 | 62 | 248 | 
| /27 | 255.255.255.224 | 8 | 30 | 240 | 
| /28 | 255.255.255.240 | 16 | 14 | 224 | 
| /29 | 255.255.255.248 | 32 | 6 | 192 | 
| /30 | 255.255.255.252 | 64 | 2 | 128 | 
| /31 | 255.255.255.254 | 128 | 2 * | 256 |