online CIDR and IP subnet calculator : Check host

133.18.1.0-133.18.1.255
133.18.1.0/24

133.18.2.0-133.18.3.255
133.18.2.0/23

133.18.4.0-133.18.7.255
133.18.4.0/22

133.18.8.0-133.18.15.255
133.18.8.0/21

133.18.16.0-133.18.31.255
133.18.16.0/20

133.18.32.0-133.18.63.255
133.18.32.0/19

133.18.64.0-133.18.127.255
133.18.64.0/18

133.18.128.0-133.18.255.255
133.18.128.0/17

IP subnet calculator 133.18.1.0-133.18.255.255