Robtex

Up: 217.66.84.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.66.84.0/25
Down right: 217.66.84.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.66.84.0	PTR	net84.smrtlc.net
217.66.84.66	PTR	ps.mbf-samara.ru
217.66.84.83	PTR	mail.inversia.ru
217.66.84.107	PTR	mxs.gk-stu.ru
217.66.84.109	A+PTR	mail.byte-1c.ru
217.66.84.109	A	mail.biztech.ru
217.66.84.109	A	mxs.gk-stu.ru
217.66.84.114	A+PTR	gateway.electroshield.ru
217.66.84.115	A+PTR	phoenix.electroshield.ru
217.66.84.115	A	westie.sesh.ru
217.66.84.115	A	mail.sesh.ru
217.66.84.116	A+PTR	rdp.electroshield.ru
217.66.84.116	A	mail.redclay.samara.ru
217.66.84.116	A	cusco.electroshield.ru
217.66.84.118	PTR	dumb2.electroshield.ru
217.66.84.118	A	owa.sesh.ru