online CIDR and IP subnet calculator : Check host

87.240.191.0-87.240.191.3
87.240.191.0/30

87.240.128.0-87.240.159.255
87.240.128.0/19

87.240.160.0-87.240.175.255
87.240.160.0/20

87.240.176.0-87.240.183.255
87.240.176.0/21

87.240.184.0-87.240.187.255
87.240.184.0/22

87.240.188.0-87.240.189.255
87.240.188.0/23

87.240.190.0-87.240.190.255
87.240.190.0/24

IP subnet calculator 87.240.128.0-87.240.191.3