Robtex

Up: 80.255.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 80.255.16.0/21
Down right: 80.255.24.0/21

IP	Type	Hostname
80.255.16.42	PTR	server.af-e.ru
80.255.16.62	PTR	mail.presshouse.ru
80.255.16.98	PTR	pokmail.ru
80.255.18.6	A	proxy.labor.ru
80.255.18.10	A+PTR	smic.labor.ru
80.255.18.10	A	ns.labor.ru
80.255.18.10	A	mail.labor.ru
80.255.18.170	PTR	mail.mymfc.ru
80.255.19.58	PTR	big1.office.ebazaar.ru
80.255.19.242	PTR	baeff.ru
80.255.20.166	PTR	mirat1.shoko.ru
80.255.20.246	A	mx2.berghoff.ru
80.255.21.67	PTR	ns.mosuzedu.ru
80.255.21.73	A	73.mosuzedu.ru
80.255.21.75	A	75.mosuzedu.ru
80.255.23.210	PTR	mx1.agapov.su.23.255.80.in-addr.arpa
80.255.23.210	A	mx1.agapov.su
80.255.24.3	PTR	mail1.wmt.ru
80.255.24.116	PTR	mail.mossport.ru
80.255.24.146	A	mail2.pronto24.ru
80.255.24.148	PTR	mail.pronto24.ru
80.255.24.148	PTR	mail.tc-kurs.ru
80.255.24.242	PTR	mail.cosmik.ru
80.255.27.66	PTR	trekhgorka.ru
80.255.29.242	A+PTR	post2.leadermt.ru
80.255.31.163	PTR	mail.mvbank.ru
80.255.31.203	PTR	mxx.vympelgroup.ru
80.255.31.203	A	vympelmail.ru