IPV4网络掩码对照表

内网IP地址以 0.0.0.0 计算

序号

子网掩码

掩码位

主机数

子网数

1

255.255.255.255

32

0

16,777,216

2

255.255.255.254

31

0

8,388,608

3

255.255.255.252

30

2

4,194,304

4

255.255.255.248

29

6

2,097,152

5

255.255.255.240

28

14

1,048,576

6

255.255.255.224

27

30

524,288

7

255.255.255.192

26

62

262,144

8

255.255.255.128

25

126

131,072

9

255.255.255.0

24

254

65,536

10

255.255.254.0

23

510

32,768

11

255.255.252.0

22

1022

16,384

12

255.255.248.0

21

2046

8,192

13

255.255.240.0

20

4094

4,096

14

255.255.224.0

19

8190

2,048

15

255.255.192.0

18

16,382

1,024

16

255.255.128.0

17

32,766

512

17

255.255.0.0

16

65,534

256

18

255.254.0.0

15

131,070

128

19

255.252.0.0

14

262,142

64

20

255.248.0.0

13

524,286

32

21

255.240.0.0

12

1,048,574

16

22

255.224.0.0

11

2,097,150

8

23

255.192.0.0

10

4,194,302

4

24

255.128.0.0

9

8,388,606

2

25

255.0.0.0

8

16,777,214

1

26

254.0.0.0

7

27

252.0.0.0

6

28

248.0.0.0

5

29

240.0.0.0

4

30

224.0.0.0

3

31

192.0.0.0

2

32

128.0.0.0

1

33

0.0.0.0

0