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TCP/IP Subnetting Address Examples

Listed below are the IP address tables for Class A, Class B and Class C. Each table presents:

  • The Maximum number of Subnets for a given mask

  • The Maximum number of hosts for a given mask

  • The first and second subnet information,as follows:

    • The Subnet number which is used for routing (this is the number displayed in routing tables)

    • The valid IP address ranges for the subnets

    • The IP subnet broadcast address

  • Please note, the information on the first and last subnets has not been displayed as some hosts are unable to use these subnets, see RFC 1519 or 1812 for more information

  • No liability is taken for the correctness of the information supplied on this page or any other page, please check out the Copyright Notice

Class A IP Address Table

No: of Subnet bits

Subnet Mask

Subnet Mask in Hex

No: Subnets

No: Hosts

Max No: of Hosts (Nets * Hosts)

1st Subnet Addr. Used for Routing1st Subnet Addr Range1st Subnet B'cast2nd Subnet Addr. Used for Routing2nd Subnet Addr Range2nd Subnet B'cast

2

255.192.0.0

FF.C0.0.0

2

4194302

8388604

X.64.0.0

X.64.0.1 to X.127.255.254

X.127.255.255

X.128.0.0

X.128.0.1 to X.191.255.254

X.191.255.255

3

255.224.0.0

FF.E0.0.0

6

2097150

12582900

X.32.0.0

X.32.0.1 to X.63.255.254

X.63.255.255

X.64.0.0 

X.64.0.1 to X.95.0.254 

X.95.255.255 

4

255.240.0.0

FF.F0.0.0

14

1048574

14680036

  X.16.0.0

  X.16.0.1 to X.31.255.254

X.31.255.255 

X.32.0.0 

X.32.0.1 to X.47.255.254 

  X.47.255.255

5

255.248.0.0

FF.F8.0.0

30

524286

15728580

  X.8.0.0

X.8.0.1 to X.15.255.254

X.15.255.255

X.16.0.0

X.16.0.1 to X.23.255.254

X.23.255.255

6

255.252.0.0

FF.FC.0.0

62

262142

16252804

  X.4.0.0

X.4.0.1 to X.7.255.254

X.7.255.255

X.8.0.0

X.8.0.1 to X.11.255.254

X.11.255.255

7

255.254.0.0

FF.FE.0.0

126

131070

16514820

X.2.0.0 

X.2.0.1 to X.3.255.254

X.3.255.255

X.4.0.0

X.4.0.1 to X.5.255.254

X.5.255.255

8

255.255.0.0

FF.FF.0.0

254

65534

16645636

  X.1.0.0

X.1.0.1 to X.1.255.254

X.1.255.255

X.2.0.0 

X.2.0.1 to X.2.255.254

 X.2.255.255

9

255.255.128.0

FF.FF.80.0

510

32766

16710660

X.0.128.0

X.0.128.1 to X.0.255.254

X.0.255.255 

X.1.0.0 

X.1.0.1 to X.1.127.254

X.1.127.255 

10

255.255.192.0

FF.FF.C0.0

1022

16382

16742404

  X.0.64.0

X.0.64.1 to X.0.127.254 

X.0.127.255 

X.0.128.0 

X.0.128.1 to X.0.191.254 

X.0.191.255 

11

255.255.224.0

FF.FF.E0.0

2046

8190

16756740

  X.0.32.0

  X.0.32.1 to X.0.63.254

X.0.63.255 

X.0.64.0 

X.0.64.1 to X.0.95.254 

X.0.95.255 

12

255.255.240.0

FF.FF.F0.0

4094

4094

16760836

X.0.16.0 

X.0.16.1 to X.0.31.254 

X.0.31.255 

X.0.32.0 

X.0.32.1 to X.0.47.254 

X.0.47.255 

13

255.255.248.0

FF.FF.F8.0

8190

2046

16756740

X.0.8.0

X.0.8.1 to X.0.15.254 

X.0.15.255 

X.0.16.0 

X.0.16.1 to X.0.23.254 

X.0.23.255 

14

255.255.252.0

FF.FF.FC.0

16382

1022

16742404

  X.0.4.0

X.0.4.1 to X.0.7.254 

X.0.7.255 

 X.0.8.0

X.0.8.1 to X.0.11.254 

 X.0.11.255

15

255.255.254.0

FF.FF.FE.0

32766

510

16710660

 X.0.2.0

X.0.2.1 to X.0.3.254 

X.0.3.255

X.0.4.0

X.0.4.1 to X.0.5.254

X.0.5.255

16

255.255.255.0

FF.FF.FF.0

65534

254

16645636

X.0.1.0

X.0.1.1 to X.0.1.254 

X.0.1.255 

X.0.2.0 

X.0.2.1 to X.0.2.254 

X.0.2.255 

17

255.255.255.128

FF.FF.FF.80

131070

126

16514820

X.0.0.128

X.0.0.129 to X.0.0.254 

X.0.0.255 

X.0.1.0 

X.0.1.1 to X.0.1.126

  X.0.1.127

18

255.255.255.192

FF.FF.FF.C0

262142

62

16252804

 X.0.0.64

X.0.0.65 to X.0.0.126 

  X.0.0.127

X.0.0.128 

X.0.0.129 to X.0.0.190 

X.0.0.191 

19

255.255.255.224

FF.FF.FF.E0

524286

30

15728580

  X.0.0.32

X.0.0.33 to X.0.0.62 

  X.0.0.63

X.0.0.64 

X.0.0.65 to X.0.0.94 

X.0.0.95 

20

255.255.255.240

FF.FF.FF.F0

1048574

14

14680036

  X.0.0.16

X.0.0.17 to X.0.0.30 

X.0.0.31 

X.0.0.32 

X.0.0.33 to X.0.0.46 

X.0.0.47 

21

255.255.255.248

FF.FF.FF.F8

2097150

6

12582900

  X.0.0.8

X.0.0.9 to X.0.0.14 

X.0.0.15 

X.0.0.16 

X.0.0.17 to X.0.0.22 

X.0.0.23 

22

255.255.255.252

FF.FF.FF.FC

4194302

2

8388604

  X.0.0.4

X.0.0.5   to X.0.0.6 

X.0.0.7 

X.0.0.8 

X.0.0.9 to X.0.0.10 

X.0.0.11 

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Class B IP Address Table

tNo: of Subnet bitss

Subnet Mask

Subnet Mask in Hex

No: Subnets

No: Hosts

Max No: of Hosts (Nets * Hosts)

1st Subnet Addr. Used for Routing1st Subnet Addr Range1st Subnet B'cast2nd Subnet Addr. Used for Routing2nd Subnet Addr Range2nd Subnet B'cast

2

255.255.192.0

FF.FF.C0.0

2

16382

32764

X.Y.64.0

X.Y.64.1   to X.Y.127.254

X.Y.127.255

X.Y.128.0

X.Y.128.1 to X.Y.191.254

X.Y.191.255

3

255.255.224.0

FF.FF.E0.0

6

8190

49140

X.Y.32.0

X.Y.32.1 to X.Y.63.254

X.Y.63.255

X.Y.64.0

X.Y.64.1 to X.Y.95.254

X.Y.95.255

4

255.255.240.0

FF.FF.F0.0

14

4094

57316

X.Y.16.0

X.Y.16.1 to X.Y.31.254

X.Y.31.255

X.Y.32.0

X.Y.32.1 to X.Y.47.254

X.Y.47.255

5

255.255.248.0

FF.FF.F8.0

30

2046

61380

X.Y.8.0

X.Y.8.1 to X.Y.15.254

X.Y.15.255

X.Y.16.0

X.Y.16.1 to X.Y.23.254

X.Y.23.255

6

255.255.252.0

FF.FF.FC.0

62

1022

63364

X.Y.4.0

X.Y.4.1 to X.Y.7.254

X.Y.7.255

X.Y.8.0

X.Y.8.1 to X.Y.11.254

X.Y.11.255

7

255.255.254.0

FF.FF.FE.0

126

510

64260

X.Y.2.0

X.Y.2.1 to X.Y.3.254

X.Y.3.255

X.Y.4.0

X.Y.4.1 to X.Y.5.254

X.Y.5.255

8

255.255.255.0

FF.FF.FF.0

254

254

64516

X.Y.1.0

X.Y.1.1 to X.Y.254

X.Y.1.255

X.Y.2.0

X.Y.2.1 to X.Y.2.254

X.Y.2.255

9

255.255.255.128

FF.FF.FF.80

510

126

64260

X.Y.0.128

X.Y.0.129 to X.Y.0.254

X.Y.0.255

X.Y.1.0

X.Y.1.1 to X.Y.1.126

X.Y.1.127

10

255.255.255.192

FF.FF.FF.C0

1022

62

63364

X.Y.0.64

X.Y.0.65 to X.Y.0.126

X.Y.0.127

X.Y.0.128

X.Y.0.129 to X.Y.0.190

X.Y.0.191

11

255.255.255.224

FF.FF.FF.E0

2046

30

61380

X.Y.0.32

X.Y.0.33 to X.Y.0.62

X.Y.0.63

X.Y.0.64

X.Y.0.65 to X.Y.0.94

X.Y.0.95

12

255.255.255.240

FF.FF.FF.F0

4094

14

57316

X.Y.0.16

X.Y.0.17 to X.Y.0.30

X.Y.0.31

X.Y.0.32

X.Y.0.33 to X.Y.0.46

X.Y.0.47

13

255.255.255.248

FF.FF.FF.F8

8190

6

49140

X.Y.0.8

X.Y.0.9 to X.Y.0.14

X.Y.0.15

X.Y.0.16

X.Y.0.17 to X.Y.0.22

X.Y.0.23

14

255.255.255.252

FF.FF.FF.FC

16382

2

32764

X.Y.0.4

X.Y.0.5 to X.Y.0.6

X.Y.0.7

X.Y.0.8

X.Y.0.9 to X.Y.0.10

X.Y.0.11

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Class C IP Address Table

No: of Subnet bits

Subnet Mask

Subnet Mask in Hex

No: Subnets

No: Hosts

Max No: of Hosts (Nets * Hosts)

1st Subnet Addr. Used for Routing1st Subnet Addr Range1st Subnet B'cast2nd Subnet Addr. Used for Routing2nd Subnet Addr Range2nd Subnet B'cast

2

255.255.255.192

FF.FF.FF.C0

2

62

124

X.Y.Z.64

X.Y.Z.65 to X.Y.Z.126

X.Y.Z.127

X.Y.Z.128

X.Y.Z.129 to X.Y.Z.190

X.Y.Z.191

3

255.255.255.224

FF.FF.FF.E0

6

30

180

X.Y.Z.32

X.Y.Z.33 to X.Y.Z.62

X.Y.Z.63

X.Y.Z.64

X.Y.Z.65 to X.Y.Z.94

X.Y.Z.95

4

255.255.255.240

FF.FF.FF.F0

14

14

196

X.Y.Z.16

X.Y.Z.17 to X.Y.Z.30

X.Y.Z.31

X.Y.Z.32

X.Y.Z.33 to X.Y.Z.46

X.Y.Z.47

5

255.255.255.248

FF.FF.FF.F8

30

6

180

X.Y.Z.8

X.Y.Z.9  to X.Y.Z.14

X.Y.Z.15

X.Y.Z.16

X.Y.Z.17 to X.Y.Z.22

X.Y.Z.23

6

255.255.255.252

FF.FF.FF.FC

62

2

124

X.Y.Z.4

X.Y.Z.5 to X.Y.Z.6

X.Y.Z.7

X.Y.Z.8

X.Y.Z.9  to X.Y.Z.10

X.Y.Z.11

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