Robtex

Up: 77.232.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 77.232.56.0/22
Down right: 77.232.60.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.232.56.38	PTR	spb.geprobank.ru
77.232.56.58	PTR	domino.easterfestival.org
77.232.56.58	A	easterfestival.org
77.232.56.90	PTR	mail.petrocollege.ru
77.232.56.170	PTR	mx1.rosdiagnostika.ru
77.232.56.170	A	mail.rosdiagnostika.ru
77.232.56.198	A+PTR	kotolis.c.eut.ru
77.232.56.198	A	fire.koreana.spb.ru
77.232.56.198	A	readsomeapp.com
77.232.57.62	PTR	mail.cleanliness.ru
77.232.57.142	A	mail.mirogroup.ru
77.232.57.162	A+PTR	do.spb.muh.ru
77.232.57.162	A	macro-lab.ru
77.232.57.194	A+PTR	relay.afaya.ru
77.232.57.226	PTR	mail.incomsys.ru
77.232.57.226	A	server.incomsys.ru
77.232.58.28	A+PTR	maileur.cma-cgm.spb.su
77.232.58.69	A+PTR	mail2.teletax.ru
77.232.58.91	PTR	rad.auction-house.ru
77.232.58.122	A	priboy.priboy-invest.ru
77.232.58.123	PTR	mail.petrocollege.ru
77.232.58.138	A+PTR	post.panimport.ru
77.232.58.139	A	service.panimport.ru
77.232.58.146	A+PTR	mail.transmost.ru
77.232.58.146	A	mail2.transmost.ru
77.232.58.242	A	mail.dkvdk.ru
77.232.59.27	PTR	mail.incotec-cargo.spb.ru
77.232.59.27	PTR	mail.nwinco.spb.ru
77.232.59.35	PTR	wild.ironcat.ru
77.232.59.35	A	mail.karat-group.ru
77.232.59.35	A	child-car-seats.ru
77.232.59.36	PTR	1000-parts.ru
77.232.59.99	A+PTR	mail.cibank.ru
77.232.59.99	A	bank0.cibank.ru
77.232.59.133	A	webmail.petrocollege.ru
77.232.59.133	A	mail.petrocollege.ru
77.232.59.134	A	portal.petrocollege.ru
77.232.59.135	A	xn--d1abafrgavbgmx.xn--p1ai
77.232.59.138	PTR	erp.itdc.ru
77.232.59.156	PTR	mx-spb.freshforex.ru
77.232.59.188	PTR	mailserrver6.vilash.ru
77.232.59.188	A	mailserver6.vilash.ru
77.232.59.189	A	mailserver4.vilash.ru
77.232.59.231	PTR	www.bestwatch.ru
77.232.59.231	A	ns1.juwelir.ru
77.232.59.231	A	lukswatch.ru
77.232.59.232	PTR	www.bestwatch.ru
77.232.59.233	PTR	mail2.bestwatch.ru
77.232.59.235	A	mail2.bestwatch.ru
77.232.59.235	A	relay.bestwatch.ru
77.232.59.244	PTR	portnews.ru
77.232.59.245	A	mate.pro
77.232.59.245	A	igps.ru
77.232.60.10	A+PTR	mail.nch-spb.com
77.232.60.13	A	mail.zsdmagistral.ru
77.232.60.26	A+PTR	exch.uztec.ru
77.232.60.154	A+PTR	gw2.infoenergo.ru
77.232.60.154	A	mx2.infoenergo.ru
77.232.60.162	PTR	aqville.ru
77.232.60.162	A	alternative-kb.ru
77.232.60.162	A	buh-list.ru
77.232.60.164	PTR	mail.inotec.ru
77.232.60.165	PTR	mail.buh-list.ru
77.232.60.178	PTR	deusex.anten.ru
77.232.60.178	A	mail.geopro.ru
77.232.61.18	A+PTR	calend.ru
77.232.61.18	A	www.calend.ru
77.232.61.18	A	*.calend.ru
77.232.61.19	A+PTR	shkolazhizni.ru
77.232.61.66	A+PTR	mx.corpnet.lenmgt.ru
77.232.61.66	A	mx.lenmetro.ru
77.232.61.72	A+PTR	allserv.lenmetro.ru
77.232.61.122	PTR	mail1.neocomspb.ru
77.232.61.122	A	mail1.trbonet.ru
77.232.61.122	A	mail1.eurozone.ru
77.232.61.123	PTR	mx3.trbonet.com
77.232.62.10	PTR	ns.fit.spb.ru
77.232.62.27	A	service.panimport.ru
77.232.62.28	A	www.zangis.ru
77.232.62.28	A	zangis.ru
77.232.62.50	A+PTR	gw.spu-spb.ru
77.232.62.50	A+PTR	gw.welcome-spb.ru
77.232.62.54	A	mx.elikort.ru
77.232.62.83	A	mx2.eurozone.ru
77.232.62.83	A	mx2.proffradio.ru
77.232.62.83	A	mx2.neocommsk.ru
77.232.62.106	A	blago-detel.com
77.232.62.106	A	mail.blago-detel.com
77.232.62.109	A+PTR	mail.epsilon.spb.ru
77.232.62.166	PTR	gate.spbpk.ru
77.232.63.30	A	xn--80aganipbwbb3q.xn--p1ai
77.232.63.30	A	vlasenkoadmin.com
77.232.63.30	A	zalogologia.ru
77.232.63.51	PTR	mail.lptp.ru
77.232.63.92	A	mail.alternative-spb.ru
77.232.63.186	PTR	mail.st.spb.ru
77.232.63.210	A	sgc-m.ru