Class C |
| Mask |
Notation |
Subnets |
Hosts |
| 255.255.255.0 |
/24 |
1 |
256 |
| 255.255.255.128 |
/25 |
2 |
128 |
| 255.255.255.192 |
/26 |
4 |
64 |
| 255.255.255.224 |
/27 |
8 |
32 |
| 255.255.255.240 |
/28 |
16 |
16 |
| 255.255.255.248 |
/29 |
32 |
8 |
| 255.255.255.252 |
/30 |
64 |
4 |
| 255.255.255.254 |
/31 |
128 |
2 |
| 255.255.255.255 |
/32 |
256 |
1 |
|
Class B |
| Mask |
Notation |
Subnets |
Hosts |
| 255.255.0.0 |
/16 |
1 |
65,536 |
| 255.255.128.0 |
/17 |
2 |
32,768 |
| 255.255.192.0 |
/18 |
4 |
16,384 |
| 255.255.224.0 |
/19 |
8 |
8,192 |
| 255.255.240.0 |
/20 |
16 |
4,096 |
| 255.255.248.0 |
/21 |
32 |
2,048 |
| 255.255.252.0 |
/22 |
64 |
1,024 |
| 255.255.254.0 |
/23 |
128 |
512 |
| 255.255.255.0 |
/24 |
256 |
256 |
|
Class A |
| Mask |
Notation |
Subnets |
Hosts |
| 255.0.0.0 |
/8 |
1 |
16,777,216 |
| 255.128.0.0 |
/9 |
2 |
8,388,608 |
| 255.192.0.0 |
/10 |
4 |
4,194,304 |
| 255.224.0.0 |
/11 |
8 |
2,097,152 |
| 255.240.0.0 |
/12 |
16 |
1,048,576 |
| 255.248.0.0 |
/13 |
32 |
524,288 |
| 255.252.0.0 |
/14 |
64 |
262,144 |
| 255.254.0.0 |
/15 |
128 |
131,072 |
| 255.255.0.0 |
/16 |
256 |
65,536 |
|