Subnet table
| IP block | Notation | Subnet mask | Inverse
mask |
| 1 | /32 (single) |
255.255.255.255 | 0.0.0.0 |
| 2 | /31 |
255.255.255.254 | 0.0.0.1 |
| 4 | /30 |
255.255.255.252 | 0.0.0.3 |
| 8 | /29 |
255.255.255.248 | 0.0.0.7 |
| 16 | /28 |
255.255.255.240 | 0.0.0.15 |
| 32 | /27 |
255.255.255.224 | 0.0.0.31 |
| 64 | /26 |
255.255.255.192 | 0.0.0.63 |
| 128 | /25 |
255.255.255.128 | 0.0.0.127 |
| 256 | /24 |
255.255.255.0 | 0.0.0.255 |
| 256 * 2 | /23 |
255.255.254.0 | 0.0.1.255 |
| 256 * 4 | /22 |
255.255.252.0 | 0.0.3.255 |
| 256 * 8 | /21 |
255.255.248.0 | 0.0.7.255 |
| 256 * 16 | /20 |
255.255.240.0 | 0.0.15.255 |
| 256 * 32 | /19 |
255.255.224.0 | 0.0.31.255 |
| 256 * 64 | /18 |
255.255.192.0 | 0.0.63.255 |
| 256 * 128 | /17 |
255.255.128.0 | 0.0.127.255 |
| 65,536 | /16 |
255.255.0.0 | 0.0.255.255 |
| 65,536 * 2 | /15 |
255.254.0.0 | 0.1.255.255 |
| 65,536 * 4 | /14 |
255.252.0.0 | 0.3.255.255 |
| 65,536 * 8 | /13 |
255.248.0.0 | 0.7.255.255 |
| 65,536 * 16 | /12 |
255.240.0.0 | 0.15.255.255 |
| 65,536 * 32 | /11 |
255.224.0.0 | 0.31.255.255 |
| 65,536 * 64 | /10 |
255.192.0.0 | 0.63.255.255 |
| 65,536 * 128 | /9 |
255.128.0.0 | 0.127.255.255 |
| 16,777,216 | /8 |
255.0.0.0 | 0.255.255.255 |
| 16,777,216 * 2 | /7 |
254.0.0.0 | 1.255.255.255 |
| 16,777,216 * 4 | /6 |
252.0.0.0 | 3.255.255.255 |
| 16,777,216 * 8 | /5 |
248.0.0.0 | 7.255.255.255 |
| 16,777,216 * 16 | /4 |
240.0.0.0 | 15.255.255.255 |
| 16,777,216 * 32 | /3 |
224.0.0.0 | 31.255.255.255 |
| 16,777,216 * 64 | /2 |
192.0.0.0 | 63.255.255.255 |
| 16,777,216 * 128 | /1 |
128.0.0.0 | 127.255.255.255 |
| Default Route | /0 |
0.0.0.0 | 255.255.255.255 |