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Allowed Class A Subnets and Host IP addresses
(Total Hosts = #of Subnets times #of Hosts)


# bits

Subnet Mask

CIDR

# Subnets

# Hosts

Total Hosts

2

255.192.0.0

/10

2

4194302

8388604

3

255.224.0.0

/11

6

2097150

12582900

4

255.240.0.0

/12

14

1048574

14680036

5

255.248.0.0

/13

30

524286

15728580

6

255.252.0.0

/14

62

262142

16252804

7

255.254.0.0

/15

126

131070

16514820

8

255.255.0.0

/16

254

65534

16645636

9

255.255.128.0

/17

510

32766

16710660

10

255.255.192.0

/18

1022

16382

16742404

11

255.255.224.0

/19

2046

8190

16756740

12

255.255.240.0

/20

4094

4094

16760836

13

255.255.248.0

/21

8190

2046

16756740

14

255.255.252.0

/22

16382

1022

16742404

15

255.255.254.0

/23

32766

510

16710660

16

255.255.255.0

/24

65534

254

16645636

17

255.255.255.128

/25

131070

126

16514820

18

255.255.255.192

/26

262142

62

16252804

19

255.255.255.224

/27

524286

30

15728580

20

255.255.255.240

/28

1048574

14

14680036

21

255.255.255.248

/29

2097150

6

12582900

22

255.255.255.252

/30

4194302

2

8388604



Allowed Class B Subnets and Host IP addresses
(Total Hosts = #of Subnets times #of Hosts)


# bits

Subnet Mask

CIDR

# Subnets

# Hosts

Total Hosts

2

255.255.192.0

/18

2

16382

32764

3

255.255.224.0

/19

6

8190

49140

4

255.255.240.0

/20

14

4094

57316

5

255.255.248.0

/21

30

2046

61380

6

255.255.252.0

/22

62

1022

63364

7

255.255.254.0

/23

126

510

64260

8

255.255.255.0

/24

254

254

64516

9

255.255.255.128

/25

510

126

64260

10

255.255.255.192

/26

1022

62

63364

11

255.255.255.224

/27

2046

30

61380

12

255.255.255.240

/28

4094

14

57316

13

255.255.255.248

/29

8190

6

49140

14

255.255.255.252

/30

16382

2

32764



Allowed Class C Subnets and Host IP addresses
(Total Hosts = #of Subnets times #of Hosts)


# bits

Subnet Mask

CIDR

# Subnets

# Hosts

Total Hosts

2

255.255.255.192

/26

2

62

124

3

255.255.255.224

/27

6

30

180

4

255.255.255.240

/28

14

14

196

5

255.255.255.248

/29

30

6

180

6

255.255.255.252

/30

62

2

124

 

 

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