Robtex

Up: 84.52.96.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 84.52.97.0/25
Down right: 84.52.97.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.52.97.37	PTR	84-52-97-37.westcall.net
84.52.97.52	PTR	relay.rubeg.com
84.52.97.61	PTR	mail.vtl.spb.ru
84.52.97.72	PTR	spbfbft.ru
84.52.97.73	A+PTR	mx2.dipaul.ru
84.52.97.76	A+PTR	mx.plastek.spb.ru
84.52.97.76	A	plastek.spb.ru
84.52.97.78	PTR	mail.plastek.spb.ru
84.52.97.78	A	plastek-msk.ru
84.52.97.82	PTR	84-52-97-82.westcall.net
84.52.97.89	PTR	84-52-97-89.westcall.net
84.52.97.89	A	ns.winlink.ru
84.52.97.108	PTR	84-52-97-108.westcall.net
84.52.97.121	PTR	84-52-97-121.westcall.net
84.52.97.133	PTR	84-52-97-133.westcall.net
84.52.97.133	A	arnair.ru
84.52.97.138	PTR	84-52-97-138.westcall.net
84.52.97.138	A	cloffhotel.ru
84.52.97.138	A	clof.ru
84.52.97.166	PTR	piters.spb.rss.ru
84.52.97.206	A+PTR	racenw.spb.ru
84.52.97.206	A	ns.racenw.spb.ru
84.52.97.206	A	mail.racenw.spb.ru
84.52.97.208	PTR	relay2.starless.ru
84.52.97.211	PTR	mail.szma.com
84.52.97.212	PTR	mail.probki.net
84.52.97.228	PTR	fm.n-l-e.ru
84.52.97.235	PTR	84-52-97-235.westcall.net
84.52.97.235	A	softrex.com
84.52.97.235	A	uknw.ru
84.52.97.240	PTR	mail.starless.ru
84.52.97.240	A	relay.starless.ru
84.52.97.240	A	ipe65.ru
84.52.97.247	A+PTR	m.sppcm.ru
84.52.97.250	PTR	arb4x4.ru.97.52.84.in-addr.arpa
84.52.97.250	PTR	vse4x4.ru.97.52.84.in-addr.arpa
84.52.97.250	A	ydnx.net