| Quantity in Range | SubNet Mask | Hex SubNet Mask | CIDR | Bit Mask | |
| 1 | 255.255.255.255 | FF.FF.FF.FF | xxx.xxx.xxx.xxx/32 | 11111111111111111111111111111111 | D Class |
| 2 | 255.255.255.254 | FF.FF.FF.FE | xxx.xxx.xxx.xxx/31 | 11111111111111111111111111111110 | |
| 4 | 255.255.255.252 | FF.FF.FF.FC | xxx.xxx.xxx.xxx/30 | 11111111111111111111111111111100 | |
| 8 | 255.255.255.248 | FF.FF.FF.F8 | xxx.xxx.xxx.xxx/29 | 11111111111111111111111111111000 | |
| 16 | 255.255.255.240 | FF.FF.FF.F0 | xxx.xxx.xxx.xxx/28 | 11111111111111111111111111110000 | |
| 32 | 255.255.255.224 | FF.FF.FF.E0 | xxx.xxx.xxx.xxx/27 | 11111111111111111111111111100000 | |
| 64 | 255.255.255.192 | FF.FF.FF.C0 | xxx.xxx.xxx.xxx/26 | 11111111111111111111111111000000 | |
| 128 | 255.255.255.128 | FF.FF.FF.80 | xxx.xxx.xxx.xxx/25 | 11111111111111111111111110000000 | |
| 256 | 255.255.255.0 | FF.FF.FF.00 | xxx.xxx.xxx.xxx/24 | 11111111111111111111111100000000 | C Class |
| 512 | 255.255.254.0 | FF.FF.FE.00 | xxx.xxx.xxx.xxx/23 | 11111111111111111111111000000000 | |
| 1,024 | 255.255.252.0 | FF.FF.FC.00 | xxx.xxx.xxx.xxx/22 | 11111111111111111111110000000000 | |
| 2,048 | 255.255.248.0 | FF.FF.F8.00 | xxx.xxx.xxx.xxx/21 | 11111111111111111111100000000000 | |
| 4,096 | 255.255.240.0 | FF.FF.F0.00 | xxx.xxx.xxx.xxx/20 | 11111111111111111111000000000000 | |
| 8,192 | 255.255.224.0 | FF.FF.E0.00 | xxx.xxx.xxx.xxx/19 | 11111111111111111110000000000000 | |
| 16,384 | 255.255.192.0 | FF.FF.C0.00 | xxx.xxx.xxx.xxx/18 | 11111111111111111100000000000000 | |
| 32,768 | 255.255.128.0 | FF.FF.80.00 | xxx.xxx.xxx.xxx/17 | 11111111111111111000000000000000 | |
| 65,536 | 255.255.0.0 | FF.FF.00.00 | xxx.xxx.xxx.xxx/16 | 11111111111111110000000000000000 | B Class |
| 131,072 | 255.254.0.0 | FF.FE.00.00 | xxx.xxx.xxx.xxx/15 | 11111111111111100000000000000000 | |
| 262,144 | 255.252.0.0 | FF.FC.00.00 | xxx.xxx.xxx.xxx/14 | 11111111111111000000000000000000 | |
| 524,288 | 255.248.0.0 | FF.F8.00.00 | xxx.xxx.xxx.xxx/13 | 11111111111110000000000000000000 | |
| 1,048,576 | 255.240.0.0 | FF.F0.00.00 | xxx.xxx.xxx.xxx/12 | 11111111111100000000000000000000 | |
| 2,097,152 | 255.224.0.0 | FF.E0.00.00 | xxx.xxx.xxx.xxx/11 | 11111111111000000000000000000000 | |
| 4,194,304 | 255.192.0.0 | FF.C0.00.00 | xxx.xxx.xxx.xxx/10 | 11111111110000000000000000000000 | |
| 8,388,608 | 255.128.0.0 | FF.80.00.00 | xxx.xxx.xxx.xxx/9 | 11111111100000000000000000000000 | |
| 16,777,216 | 255.0.0.0 | FF.00.00.00 | xxx.xxx.xxx.xxx/8 | 11111111000000000000000000000000 | A Class |
| 33,554,432 | 254.0.0.0 | FE.00.00.00 | xxx.xxx.xxx.xxx/7 | 11111110000000000000000000000000 | |
| 67,108,864 | 252.0.0.0 | FC.00.00.00 | xxx.xxx.xxx.xxx/6 | 11111100000000000000000000000000 | |
| 134,217,728 | 248.0.0.0 | F8.00.00.00 | xxx.xxx.xxx.xxx/5 | 11111000000000000000000000000000 | |
| 268,435,456 | 240.0.0.0 | F0.00.00.00 | xxx.xxx.xxx.xxx/4 | 11110000000000000000000000000000 | |
| 536,870,912 | 224.0.0.0 | E0.00.00.00 | xxx.xxx.xxx.xxx/3 | 11100000000000000000000000000000 | |
| 1,073,741,824 | 192.0.0.0 | C0.00.00.00 | xxx.xxx.xxx.xxx/2 | 11000000000000000000000000000000 | |
| 2,147,483,648 | 128.0.0.0 | 80.00.00.00 | xxx.xxx.xxx.xxx/1 | 10000000000000000000000000000000 |