Robtex

Up: 80.251.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 80.251.136.0/22
Down right: 80.251.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.251.136.2	PTR	scancod.ru
80.251.136.34	PTR	gate.brigadier.ru
80.251.136.69	A	mx.vpkbalance.ru
80.251.136.90	PTR	mail.frvt.ru
80.251.136.150	PTR	server.office.local
80.251.136.150	A	mail.solar-it.ru
80.251.136.170	PTR	mail.hdenergo.ru
80.251.136.171	A	angstrem.tk
80.251.136.171	A	ns1.angstrem.tk
80.251.136.198	PTR	ariadnaco.ru
80.251.136.234	PTR	remote.fabslog.ru
80.251.136.250	PTR	mail.cash24.ru
80.251.137.138	A	mail.azimutbank.ru
80.251.137.158	A+PTR	mx1.oaokb1.ru
80.251.137.180	PTR	meridiantelecom.ru
80.251.137.218	A+PTR	mail.aleatis.ru
80.251.137.218	A	ns.aleatis.ru
80.251.137.238	PTR	mx.adwiser.ru
80.251.137.246	A+PTR	mail.sputnik-auto.ru
80.251.138.38	PTR	mail.aplusbc.com
80.251.138.100	PTR	aeco.ru
80.251.138.242	PTR	owa.chairs.ru
80.251.138.250	A+PTR	imus.proteh.ru
80.251.138.250	A	mx.proteh.ru
80.251.138.250	A	mail.proteh.ru
80.251.139.1	PTR	e0-nsg-marcomk.almaztelecom.net
80.251.139.17	PTR	lre1-lo0-1.almaztelecom.net
80.251.139.34	PTR	mail.rominox.ru
80.251.139.34	PTR	mx.rominox.ru
80.251.139.64	PTR	rusich.ru
80.251.139.65	PTR	rusich.ru
80.251.139.67	PTR	rusich.ru
80.251.139.68	PTR	rusich.ru
80.251.139.72	PTR	rusich.ru
80.251.139.73	PTR	rusich.ru
80.251.139.74	PTR	rusich.ru
80.251.139.75	PTR	rusich.ru
80.251.139.82	A+PTR	mx.aibank.ru
80.251.139.93	A	gw.socium-bank.ru
80.251.139.94	A	mx.socium-bank.ru
80.251.139.137	PTR	lre1-lo0-10.almaztelecom.net
80.251.139.194	A+PTR	mail.ra-it.ru
80.251.139.195	PTR	mail.ra-it.ru
80.251.139.196	PTR	mail.ra-it.ru
80.251.139.196	A	ns4.h20.ru
80.251.139.197	PTR	mail.ra-it.ru
80.251.139.197	A	ns4.h20.ru
80.251.139.210	A+PTR	mail.aplusbc.com
80.251.139.210	A	aplusbc.com
80.251.139.219	PTR	mail.vpksoor.ru
80.251.139.220	A+PTR	mail.vpksoor.ru
80.251.139.220	A	mail.soor.ru
80.251.139.234	A	mail.raitkons.ru
80.251.140.50	PTR	mail.almaz-antey.ru
80.251.140.141	PTR	smtp.rusklimat.ru
80.251.140.234	PTR	mgeups.ru
80.251.140.250	A	mail2.mholding.ru
80.251.140.250	A	ns3.mholding.ru
80.251.141.38	A+PTR	mail.vpkgroup.ru
80.251.142.46	A+PTR	mail.infobridge.ru
80.251.142.46	A	mail.templater.ru
80.251.142.49	A+PTR	tango.elcode.ru
80.251.142.49	A	ns.xn--d1alcn6e.xn--p1ai
80.251.142.49	A	ns.elcode.ru
80.251.142.155	A	hoster.crystallgross.ru
80.251.142.162	A+PTR	mail.cgprojects.ru
80.251.142.162	A	cgprojects.ru
80.251.142.214	A	tlead.ru
80.251.143.58	PTR	gk.mpc.ru
80.251.143.61	A	mail2.mpc.ru
80.251.143.82	PTR	mail.ca-pro.ru
80.251.143.146	PTR	mail.carpethouse.ru
80.251.143.194	PTR	soap.onlinetrade.ru