Subnet Mask To Host Bits
From sbv.wiki
| Subnet Mask | Host Bits |
|---|---|
| 255.255.255.255 | 0 |
| 255.255.255.254 | 1 |
| 255.255.255.252 | 2 |
| 255.255.255.248 | 3 |
| 255.255.255.240 | 4 |
| 255.255.255.224 | 5 |
| 255.255.255.192 | 6 |
| 255.255.255.128 | 7 |
| 255.255.255.0 | 8 |
| 255.255.254.0 | 9 |
| 255.255.252.0 | 10 |
| 255.255.248.0 | 11 |
| 255.255.240.0 | 12 |
| 255.255.224.0 | 13 |
| 255.255.192.0 | 14 |
| 255.255.128.0 | 15 |
| 255.255.0.0 | 16 |
| 255.254.0.0 | 17 |
| 255.252.0.0 | 18 |
| 255.248.0.0 | 19 |
| 255.240.0.0 | 20 |
| 255.224.0.0 | 21 |
| 255.192.0.0 | 22 |
| 255.128.0.0 | 23 |
| 255.0.0.0 | 24 |