Binary Subnet Mask
| CIDR | Subnet Mask (decimal) | Subnet Mask(binary) | Available addresses | |
|---|---|---|---|---|
| /0 | 0.0.0.0 | 00000000 00000000 00000000 00000000 | 4.294.967.296 | 232 |
| /1 | 128.0.0.0 | 10000000 00000000 00000000 00000000 | 2.147.483.648 | 231 |
| /2 | 192.0.0.0 | 11000000 00000000 00000000 00000000 | 1.073.741.824 | 230 |
| /3 | 224.0.0.0 | 11100000 00000000 00000000 00000000 | 536.870.912 | 229 |
| /4 | 240.0.0.0 | 11110000 00000000 00000000 00000000 | 268.435.456 | 228 |
| /5 | 248.0.0.0 | 11111000 00000000 00000000 00000000 | 134.217.728 | 227 |
| /6 | 252.0.0.0 | 11111100 00000000 00000000 00000000 | 67.108.864 | 226 |
| /7 | 254.0.0.0 | 11111110 00000000 00000000 00000000 | 33.554.432 | 225 |
| /8 | 255.0.0.0 | 11111111 00000000 00000000 00000000 | 16.777.216 | 224 |
| /9 | 255.128.0.0 | 11111111 10000000 00000000 00000000 | 8.388.608 | 223 |
| /10 | 255.192.0.0 | 11111111 11000000 00000000 00000000 | 4.194.304 | 222 |
| /11 | 255.224.0.0 | 11111111 11100000 00000000 00000000 | 2.097.152 | 221 |
| /12 | 255.240.0.0 | 11111111 11110000 00000000 00000000 | 1.048.576 | 220 |
| /13 | 255.248.0.0 | 11111111 11111000 00000000 00000000 | 524.288 | 219 |
| /14 | 255.252.0.0 | 11111111 11111100 00000000 00000000 | 262.144 | 218 |
| /15 | 255.254.0.0 | 11111111 11111110 00000000 00000000 | 131.072 | 217 |
| /16 | 255.255.0.0 | 11111111 11111111 00000000 00000000 | 65.536 | 216 |
| /17 | 255.255.128.0 | 11111111 11111111 10000000 00000000 | 32.768 | 215 |
| /18 | 255.255.192.0 | 11111111 11111111 11000000 00000000 | 16.384 | 214 |
| /19 | 255.255.224.0 | 11111111 11111111 11100000 00000000 | 8.192 | 213 |
| /20 | 255.255.240.0 | 11111111 11111111 11110000 00000000 | 4.096 | 212 |
| /21 | 255.255.248.0 | 11111111 11111111 11111000 00000000 | 2.048 | 211 |
| /22 | 255.255.252.0 | 11111111 11111111 11111100 00000000 | 1.024 | 210 |
| /23 | 255.255.254.0 | 11111111 11111111 11111110 00000000 | 512 | 29 |
| /24 | 255.255.255.0 | 11111111 11111111 11111111 00000000 | 256 | 28 |
| /25 | 255.255.255.128 | 11111111 11111111 11111111 10000000 | 128 | 27 |
| /26 | 255.255.255.192 | 11111111 11111111 11111111 11000000 | 64 | 26 |
| /27 | 255.255.255.224 | 11111111 11111111 11111111 11100000 | 32 | 25 |
| /28 | 255.255.255.240 | 11111111 11111111 11111111 11110000 | 16 | 24 |
| /29 | 255.255.255.248 | 11111111 11111111 11111111 11111000 | 8 | 23 |
| /30 | 255.255.255.252 | 11111111 11111111 11111111 11111100 | 4 | 22 |
| /31 | 255.255.255.254 | 11111111 11111111 11111111 11111110 | 2 | 21 |
| /32 | 255.255.255.255 | 11111111 11111111 11111111 11111111 | 1 | 20 |