Robtex

Up: 193.161.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 193.161.193.0/25
Down right: 193.161.193.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.161.193.2	A+PTR	smtp.bitree.ru
193.161.193.2	A	bitree.com
193.161.193.2	A	bitree.ru
193.161.193.3	A	portmap.host
193.161.193.4	A	portmap.io
193.161.193.71	A+PTR	z59.ettm.ru
193.161.193.74	PTR	mail1.turmalin.ru
193.161.193.74	A	mail.turmalin.ru
193.161.193.74	A	mail.turmalin.su
193.161.193.99	A	portmap.host
193.161.193.99	A	portmap.io
193.161.193.99	A	www.taazurgroup.com
193.161.193.102	A	tjcenter.ru
193.161.193.130	PTR	hosting.bitree.com
193.161.193.130	A	mail.chrc.ru
193.161.193.130	A	xn--80aaxinagncjhe.xn--p1ai
193.161.193.131	PTR	hosting.bitree.com
193.161.193.131	A	aerohosting.pro
193.161.193.132	A	cufflinks.ru
193.161.193.132	A	ns1.bitree.com
193.161.193.132	A	chrc.ru