Robtex

Up: 84.21.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 84.21.64.0/20
Down right: 84.21.80.0/20

IP	Type	Hostname
84.21.64.250	PTR	expired1.axelname.ru
84.21.65.3	PTR	3.65.xxline.net
84.21.65.5	A	mail.coinpro.su
84.21.66.1	PTR	1.66.xxline.net
84.21.66.161	PTR	mx.alean.ru
84.21.67.0	PTR	0.67.xxline.net
84.21.67.69	A	mail.alr.ru
84.21.67.83	A	mail.tlkspektr.ru
84.21.67.129	PTR	129.67.xxline.net
84.21.67.140	A	soapx.standart-test.ru
84.21.67.140	A	soapx.standart-test.com
84.21.67.192	PTR	192.67.xxline.net
84.21.68.2	PTR	2.68.xxline.net
84.21.68.64	PTR	64.68.xxline.net
84.21.68.98	PTR	98.68.xxline.net
84.21.68.99	PTR	99.68.xxline.net
84.21.73.26	A	msk.rasko.ru
84.21.73.86	A	mail.regnumed.ru
84.21.75.1	PTR	mta.xxline.net
84.21.75.1	PTR	smtp.xxline.ru
84.21.77.2	PTR	2.77.xxline.net
84.21.79.34	PTR	mail.verge.ru
84.21.79.34	A	mail.terinvest.ru
84.21.86.234	A	ns2.multiplaz.ru
84.21.86.234	A	ns2.rebsys.ru
84.21.86.242	A	89057524628.ru
84.21.89.147	A	post.almin.ru
84.21.89.243	A	makroplan.ru
84.21.90.27	A	mx1.fancom.ru
84.21.90.195	PTR	mail.alga-gk.ru
84.21.92.5	A	ns1.winextreme.org
84.21.92.5	A	winextreme.org
84.21.92.76	A	mx.rlsnet.ru
84.21.93.35	PTR	server.gorodpodarkov.ru
84.21.93.51	A	mail.malina-it.ru
84.21.95.131	PTR	expired1.axelname.ru