Robtex

Up: 84.237.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 84.237.48.0/22
Down right: 84.237.52.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.237.48.126	A	n2c4.nsu.ru
84.237.48.185	PTR	host185.48.237.84.nsu.ru
84.237.48.233	PTR	host233.48.237.84.nsu.ru
84.237.49.170	A	sesc.nsu.ru
84.237.50.3	A	mx.nsunet.ru
84.237.50.5	A	ns.nsunet.ru
84.237.50.7	A	irc.nsu.ru
84.237.50.7	A	chronos.nsu.ru
84.237.50.8	PTR	host8.50.237.84.nsu.ru
84.237.50.8	A	campus.nsu.ru
84.237.50.8	A	info.at.nsu.ru
84.237.50.11	PTR	host11.50.237.84.nsu.ru
84.237.50.16	PTR	host16.50.237.84.nsu.ru
84.237.50.16	A	warehouse.nsu.ru
84.237.50.17	PTR	host17.50.237.84.nsu.ru
84.237.50.17	A	missphoto.nsu.ru
84.237.50.17	A	gf.nsu.ru
84.237.50.25	PTR	host25.50.237.84.nsu.ru
84.237.50.25	A	xn--c1att.xn--p1ai
84.237.50.25	A	nsu.ru
84.237.50.26	PTR	host26.50.237.84.nsu.ru
84.237.50.27	PTR	host27.50.237.84.nsu.ru
84.237.50.27	A	britain.nsu.ru
84.237.50.29	A	mx1.gorodok.net
84.237.50.39	A	mx.nsu.ru
84.237.50.39	A	r2b9.nsu.ru
84.237.50.40	A+PTR	mxt.nsu.ru
84.237.50.40	A	mx.nsu.ru
84.237.50.42	A+PTR	mail.nsu.ru
84.237.50.42	A+PTR	zimbra.nsu.ru
84.237.50.42	PTR	host42.50.237.84.nsu.ru
84.237.50.43	PTR	host43.50.237.84.nsu.ru
84.237.50.49	PTR	host49.50.237.84.nsu.ru
84.237.50.49	A	aurora.nsu.ru
84.237.50.49	A	forum.nsu.ru
84.237.50.50	PTR	host50.50.237.84.nsu.ru
84.237.50.50	A	france.nsu.ru
84.237.50.51	PTR	host51.50.237.84.nsu.ru
84.237.50.51	A	softmotions.com
84.237.50.57	PTR	host57.50.237.84.nsu.ru
84.237.50.57	A	ns2.nsu.ru
84.237.50.58	PTR	host58.50.237.84.nsu.ru
84.237.50.58	A	engiwiki.nsu.ru
84.237.50.58	A	cae.nsu.ru
84.237.50.61	A	missphoto.nsu.ru
84.237.50.71	A	proxy.nsu.ru
84.237.50.71	A	proxy1.nsu.ru
84.237.50.72	A	proxy2.nsu.ru
84.237.50.73	A	proxy3.nsu.ru
84.237.50.75	A	proxy5.nsu.ru
84.237.50.76	A	proxy6.nsu.ru
84.237.50.80	PTR	host80.50.237.84.nsu.ru
84.237.50.80	A	mw_test.gorodok.net
84.237.50.80	A	dorlak.gorodok.net
84.237.50.83	PTR	host83.50.237.84.nsu.ru
84.237.50.104	PTR	host104.50.237.84.nsu.ru
84.237.50.104	A	www.nsu.ru
84.237.50.123	A	tyutyunkov.net
84.237.51.2	PTR	host2.51.237.84.nsu.ru
84.237.51.2	A	hvv.nsu.ru
84.237.51.129	PTR	host129.51.237.84.nsu.ru
84.237.51.129	A	ci.nsu.ru
84.237.52.3	A	tutor.nsu.ru
84.237.52.14	PTR	host14.52.237.84.nsu.ru
84.237.52.14	A	www.phys.nsu.ru
84.237.52.14	A	phys.nsu.ru
84.237.52.17	A	ns1.ccfit.nsu.ru.nsu.ru
84.237.52.20	A	ccfit.nsu.ru
84.237.52.34	A	mmfd.nsu.ru
84.237.52.62	A	parallels.nsu.ru
84.237.52.62	A	swsoft.nsu.ru
84.237.52.66	PTR	soft.nsu.ru
84.237.52.66	PTR	host66.52.237.84.nsu.ru
84.237.52.66	A	www.mmedia.nsu.ru
84.237.52.75	PTR	host75.52.237.84.nsu.ru
84.237.52.75	A	ccphys.nsu.ru
84.237.52.99	A	philos.nsu.ru
84.237.53.22	PTR	host22.53.237.84.nsu.ru
84.237.53.171	PTR	host171.53.237.84.nsu.ru
84.237.53.175	PTR	host175.53.237.84.nsu.ru
84.237.53.179	PTR	host179.53.237.84.nsu.ru
84.237.53.182	A	dc-64b79ccd.xn----7sbaat2buskaf.xn--p1ai
84.237.53.212	A	inctalk.net
84.237.53.221	PTR	host221.53.237.84.nsu.ru
84.237.53.225	PTR	host225.53.237.84.nsu.ru
84.237.53.249	PTR	host249.53.237.84.nsu.ru
84.237.54.170	PTR	host170.54.237.84.nsu.ru
84.237.55.1	PTR	host1.55.237.84.nsu.ru
84.237.55.17	PTR	host17.55.237.84.nsu.ru
84.237.55.33	PTR	host33.55.237.84.nsu.ru
84.237.55.49	PTR	host49.55.237.84.nsu.ru
84.237.55.81	PTR	host81.55.237.84.nsu.ru
84.237.55.115	PTR	host115.55.237.84.nsu.ru
84.237.55.144	PTR	host144.55.237.84.nsu.ru
84.237.55.161	PTR	host161.55.237.84.nsu.ru
84.237.55.186	PTR	host186.55.237.84.nsu.ru
84.237.55.194	PTR	host194.55.237.84.nsu.ru
84.237.55.208	PTR	host208.55.237.84.nsu.ru
84.237.55.219	PTR	host219.55.237.84.nsu.ru
84.237.55.250	PTR	host250.55.237.84.nsu.ru