Robtex

Up: 37.53.73.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 37.53.73.128/26
Down right: 37.53.73.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
37.53.73.218	PTR	218-73-53-37.ip.ukrtel.net
37.53.73.233	A+PTR	techim.com.ua
37.53.73.233	A+PTR	txp.com.ua
37.53.73.233	A+PTR	mail.techim.com.ua
37.53.73.235	PTR	235-73-53-37.ip.ukrtel.net
37.53.73.236	PTR	236-73-53-37.ip.ukrtel.net