Robtex

Up: 81.90.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.90.0.0/21
Down right: 81.90.8.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.90.0.20	A	www.vestiri.ru
81.90.0.20	A	kupialasku.ru
81.90.0.20	A	www.kupialasku.ru
81.90.0.66	A	mail.izvarino.com
81.90.0.82	A+PTR	mx1.l-ts.ru
81.90.0.82	A	mx.parringrove.ru
81.90.0.82	A	mail.parringrove.ru
81.90.0.138	A	ns3.vtx.ru
81.90.0.243	A	mail2.ntl.ru
81.90.0.248	A	www.netline.ru
81.90.0.248	A	istelecom.ru
81.90.0.248	A	is-net.ru
81.90.0.250	PTR	dnsa1.ntl.ru
81.90.1.52	A	sv-smtp-01.grandlens.ru
81.90.1.52	A	mail.grandlens.ru
81.90.1.54	A	gold13.ru
81.90.1.60	A	mail.paydek.ru
81.90.1.82	A	remote.akimpulse.ru
81.90.1.82	A	remote.impulse-audit.ru
81.90.1.83	A+PTR	remote.rtd-u.ru
81.90.1.84	A+PTR	remote.afd-chemicals.ru
81.90.1.86	PTR	mail.worldfirst.ru
81.90.1.89	A	mail.b2bts.ru
81.90.1.98	PTR	bank-ltd.ru
81.90.1.98	A	www.baltica.ru
81.90.1.98	A	baltica.ru
81.90.1.107	A	mail.baltica.ru
81.90.1.107	A	mx.baltica.ru
81.90.1.124	A	gen-fin.ru
81.90.1.124	A	mail.gen-fin.ru
81.90.1.124	A	mail.generalfinance.ru
81.90.1.126	A+PTR	post.bank-ltd.ru
81.90.1.126	PTR	srv-exchange.msk.bank-enisey.ru
81.90.1.126	PTR	post.msk.bank-enisey.ru
81.90.1.178	PTR	ms.ufk-profit.ru
81.90.2.10	A	www.sniip.ru
81.90.2.10	A	gw.sniip.ru
81.90.2.10	A	zolotaya-loza.ru
81.90.2.61	A	mdm.primepm.ru
81.90.2.67	A	climserv.ru
81.90.2.122	A	mail.b2bts.ru
81.90.2.133	PTR	mail.sacf.ru
81.90.2.173	A	mail.red-grad.ru
81.90.2.237	A	mx.mosintrast.ru
81.90.5.1	PTR	81-90-5-1.ntl.ru
81.90.9.1	PTR	81-90-9-1.ntl.ru
81.90.13.2	PTR	mx2.sniip.ru
81.90.13.2	A+PTR	ns2.sniip.ru
81.90.13.2	A	vs.convel.ru
81.90.13.20	PTR	mail.verex.com
81.90.13.20	PTR	mail.nemiko.ru
81.90.13.20	PTR	mail.verex-group.ru
81.90.13.26	PTR	sniip-atom.ru
81.90.13.26	PTR	atomar.net.ru
81.90.13.26	A	mx.atomar.net.ru
81.90.13.31	PTR	mail.mstsystems.ru
81.90.15.1	PTR	81-90-15-1.ntl.ru
81.90.15.50	A	mail2.efimov-partners.ru
81.90.15.51	A	subs.efimov-partners.ru
81.90.15.118	A	mail2.allmagic.ru