Robtex

Up: 89.20.96.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 89.20.112.0/21
Down right: 89.20.120.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.20.112.10	A	mail1.sinergia.ru
89.20.112.34	A+PTR	gw.radius-s.ru
89.20.112.36	A	i-mail.radius-s.ru
89.20.112.38	A	i-mail2.radius-s.ru
89.20.112.64	PTR	89.20.112.64.permonline.ru
89.20.113.163	A+PTR	mail.ya.ogk4.ru
89.20.113.163	A	mx-ya01.ogk4.net
89.20.113.163	A	mx-ya01.eon-russia.com
89.20.118.31	PTR	89.20.118.31.permonline.ru
89.20.118.112	PTR	89.20.118.112.permonline.ru
89.20.118.175	PTR	89.20.118.175.permonline.ru
89.20.122.32	PTR	89.20.122.32.permonline.ru
89.20.122.208	PTR	89.20.122.208.permonline.ru
89.20.124.241	PTR	89.20.124.241.permonline.ru
89.20.126.87	PTR	89.20.126.87.permonline.ru
89.20.126.255	PTR	89.20.126.255.permonline.ru
89.20.127.114	PTR	89.20.127.114.permonline.ru
89.20.127.114	A	mail2.prg.perm.ru
89.20.127.192	PTR	89.20.127.192.permonline.ru
89.20.127.208	PTR	89.20.127.208.permonline.ru
89.20.127.224	PTR	89.20.127.224.permonline.ru
89.20.127.240	PTR	89.20.127.240.permonline.ru