IP subnets

CIDR

Netmask

IP's

/8 (class A)

255.0.0.0

16777216

/9

255.128.0.0

8388608

/10

255.192.0.0

4194304

/11

255.224.0.0

2097152

/12

255.240.0.0

1048576

/13

255.248.0.0

524288

/14

255.252.0.0

262144

/15

255.254.0.0

131072

/16 (class B)

255.255.0.0

65536

/17

255.255.128.0

32768

/18

255.255.192.0

16384

/19

255.255.224.0

8192

/20

255.255.240.0

4096

/21

255.255.248.0

2048

/22

255.255.252.0

1024

/23

255.255.254.0

512

/24 (class c)

255.255.255.0

256

/25

255.255.255.128

128

/26

255.255.255.192

64

/27

255.255.255.224

32

/28

255.255.255.240

16

/29

255.255.255.248

8

/30

255.255.255.252

4

/31

255.255.255.254

2

/32

255.255.255.255

1