Robtex

Up: 81.9.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.9.100.0/23
Down right: 81.9.102.0/23

IP	Type	Hostname
81.9.100.2	A	tue.eltel.net
81.9.100.15	PTR	gw077-109.eq.eltel.net
81.9.100.27	A+PTR	cccc.eq.eltel.net
81.9.101.61	A+PTR	bras07.eq.eltel.net
81.9.101.61	A	bras7.eq.eltel.net
81.9.101.65	A+PTR	dl40.media-portal.ru
81.9.101.69	A+PTR	dl30.media-portal.ru
81.9.101.69	A	ftp.media-portal.ru
81.9.101.70	PTR	mportal.rt077-313.eltel.net
81.9.101.72	A+PTR	relay.eltel.net
81.9.101.72	A	relay.velmail.com
81.9.101.73	A	dl80.media-portal.ru
81.9.101.74	A	rlb.media-portal.ru
81.9.101.79	PTR	media-portal.ru
81.9.101.79	A	images.media-portal.ru
81.9.101.79	A	my.maxdsl.ru
81.9.101.81	A	dl70.media-portal.ru