online CIDR and IP subnet calculator : Check host

133.242.136.0-133.242.143.255
133.242.136.0/21

133.242.144.0-133.242.159.255
133.242.144.0/20

133.242.160.0-133.242.191.255
133.242.160.0/19

133.242.192.0-133.242.255.255
133.242.192.0/18

133.243.0.0-133.243.255.255
133.243.0.0/16

133.244.0.0-133.245.255.255
133.244.0.0/15

133.246.0.0-133.246.255.255
133.246.0.0/16

IP subnet calculator 133.242.136.0-133.246.255.255