online CIDR and IP subnet calculator : Check host

123.56.81.0-123.56.81.255
123.56.81.0/24

123.56.82.0-123.56.83.255
123.56.82.0/23

123.56.84.0-123.56.87.255
123.56.84.0/22

123.56.88.0-123.56.95.255
123.56.88.0/21

123.56.96.0-123.56.103.255
123.56.96.0/21

123.56.104.0-123.56.105.255
123.56.104.0/23

123.56.106.0-123.56.106.255
123.56.106.0/24

IP subnet calculator 123.56.81.0-123.56.106.255