Robtex

Up: 188.231.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 188.231.220.0/23
Down right: 188.231.222.0/23

IP	Type	Hostname
188.231.220.242	PTR	188.231.220.242.freenet.com.ua
188.231.221.104	PTR	188.231.221.104.freenet.com.ua
188.231.223.0	PTR	188.231.223.0.freenet.com.ua
188.231.223.98	PTR	188.231.223.98.freenet.com.ua
188.231.223.255	PTR	188.231.223.255.freenet.com.ua