Robtex

Up: 213.248.54.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.248.54.0/25
Down right: 213.248.54.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.248.54.1	PTR	vlan-5.sr1.msk1.ibbn.di-net.ru
213.248.54.2	PTR	mail.houses.ru
213.248.54.5	PTR	ns.erra.net
213.248.54.6	PTR	cgp.erra.net
213.248.54.7	A	evilmp3.ru
213.248.54.20	PTR	shop1.o1.ru
213.248.54.22	PTR	shop2.o1.ru
213.248.54.24	PTR	lillyhr.ru
213.248.54.54	PTR	mail.ahz.ru
213.248.54.56	PTR	mail.lifeplace.ru
213.248.54.60	PTR	zuper.ru
213.248.54.60	A	uobugs.ru
213.248.54.60	A	openstartup.ru
213.248.54.61	PTR	mx.zuper.ru
213.248.54.68	PTR	aqua3.di-net.ru
213.248.54.78	PTR	savicheva.ru
213.248.54.79	PTR	svas.pp.ru
213.248.54.82	PTR	funkysouls.com
213.248.54.82	A	company-monolit.com
213.248.54.90	PTR	user81117.asprex.ru
213.248.54.90	A	mail.spasistudenta.ru
213.248.54.90	A	spasistudenta.ru
213.248.54.98	PTR	ns2.hostek.ru
213.248.54.101	PTR	mail2.instock.ru
213.248.54.108	PTR	web.vid.ru
213.248.54.112	PTR	optinfo.ru
213.248.54.119	PTR	user118.asprex.ru
213.248.54.119	A	rutrends.ru
213.248.54.120	PTR	poo.ru
213.248.54.134	A	archi.ainmarh.com
213.248.54.136	A	admin.use-it.ru
213.248.54.136	A	ns2.superserver.ru
213.248.54.136	A	ns2.use-it.ru
213.248.54.137	A+PTR	anarchy.blackhat.ru
213.248.54.137	A	m00.blackhat.ru
213.248.54.137	A	irc.blackhat.ru
213.248.54.138	PTR	seostatus.ru
213.248.54.138	PTR	mail.golddisk.ru
213.248.54.139	PTR	korobok.org
213.248.54.142	PTR	virtualserver.ru
213.248.54.142	PTR	hosting3.asprex.ru
213.248.54.142	A	brantova.ru
213.248.54.143	PTR	ct.ainmarh.com
213.248.54.145	PTR	user111.asprex.ru
213.248.54.148	PTR	networkpeople.info
213.248.54.151	PTR	1it.ru
213.248.54.151	A	mail.footballbooks.ru
213.248.54.155	A	multisportgames.ru
213.248.54.157	PTR	govorun.net
213.248.54.182	PTR	x-pro.ru
213.248.54.203	PTR	aqua3.di-net.ru
213.248.54.203	A	safina-art.ru
213.248.54.203	A	mishgan.ru
213.248.54.214	A	denominazione.sibintek.net
213.248.54.215	PTR	ns2.sibintek.net
213.248.54.223	PTR	funkytorrents.com
213.248.54.230	PTR	love-sl.ru
213.248.54.236	A	golubeff.ru
213.248.54.254	PTR	vlan-5.sr1.msk1.ibbn.di-net.ru