IP subnet calculator

12.0.0.2-12.1.87.255

12.0.0.2-12.0.0.3
12.0.0.2/31

12.0.0.4-12.0.0.7
12.0.0.4/30

12.0.0.8-12.0.0.15
12.0.0.8/29

12.0.0.16-12.0.0.31
12.0.0.16/28

12.0.0.32-12.0.0.63
12.0.0.32/27

12.0.0.64-12.0.0.127
12.0.0.64/26

12.0.0.128-12.0.0.255
12.0.0.128/25

12.0.1.0-12.0.1.255
12.0.1.0/24

12.0.2.0-12.0.3.255
12.0.2.0/23

12.0.4.0-12.0.7.255
12.0.4.0/22

12.0.8.0-12.0.15.255
12.0.8.0/21

12.0.16.0-12.0.31.255
12.0.16.0/20

12.0.32.0-12.0.63.255
12.0.32.0/19

12.0.64.0-12.0.127.255
12.0.64.0/18

12.0.128.0-12.0.255.255
12.0.128.0/17

12.1.0.0-12.1.63.255
12.1.0.0/18

12.1.64.0-12.1.79.255
12.1.64.0/20

12.1.80.0-12.1.87.255
12.1.80.0/21