Robtex

Up: 81.9.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.9.48.0/21
Down right: 81.9.56.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.9.48.1	A	pppoe.81.9.48.1.lanport.ru
81.9.48.3	A+PTR	pppoe.81.9.48.3.lanport.ru
81.9.48.13	A	pppoe.81.9.48.13.lanport.ru
81.9.48.22	A	pppoe.81.9.48.22.lanport.ru
81.9.48.34	A+PTR	pppoe.81.9.48.34.lanport.ru
81.9.48.34	A	mail.ekhoplanet.org
81.9.48.34	A	mail.ekhoplanet.com
81.9.50.112	A+PTR	pppoe.81.9.50.112.lanport.ru
81.9.50.173	A	pppoe.81.9.50.173.lanport.ru
81.9.50.173	A	mail.catlitter.ru
81.9.51.17	A+PTR	pppoe.81.9.51.17.lanport.ru
81.9.51.17	A	cwnmail.ru
81.9.51.17	A	*.cwnmail.ru
81.9.51.210	A+PTR	pppoe.81.9.51.210.lanport.ru
81.9.51.211	PTR	pppoe.81.9.51.211.lanport.ru
81.9.52.228	A	pppoe.81.9.52.228.lanport.ru
81.9.53.0	PTR	pppoe.81.9.53.0.lanport.ru
81.9.53.1	A+PTR	pppoe.81.9.53.1.lanport.ru
81.9.53.2	PTR	pppoe.81.9.53.2.lanport.ru
81.9.53.59	A	pppoe.81.9.53.59.lanport.ru
81.9.54.26	A	pppoe.81.9.54.26.lanport.ru
81.9.57.49	A+PTR	pppoe.81.9.57.49.lanport.ru
81.9.58.128	A+PTR	pppoe.81.9.58.128.lanport.ru
81.9.60.59	A	pppoe.81.9.60.59.lanport.ru
81.9.60.155	A	pppoe.81.9.60.155.lanport.ru
81.9.61.1	PTR	ns1.lanport.ru
81.9.61.1	A	ns2.lublino.ru
81.9.61.2	PTR	ns2.lanport.ru
81.9.61.11	A	pppoe.81.9.61.11.lanport.ru
81.9.61.39	A	pppoe.81.9.61.39.lanport.ru
81.9.61.118	A	pppoe.81.9.61.118.lanport.ru
81.9.61.227	PTR	pppoe.81.9.61.227.lanport.ru
81.9.62.79	A	pppoe.81.9.62.79.lanport.ru
81.9.62.114	A+PTR	pppoe.81.9.62.114.lanport.ru
81.9.62.114	A	saleb.ru
81.9.62.218	A	pppoe.81.9.62.218.lanport.ru
81.9.62.234	A	mx.bllack.ru
81.9.62.234	A	bllack.ru
81.9.63.19	A	ns1.centrhost.ru
81.9.63.19	A	ns1.ros-web.ru
81.9.63.29	A	ns2.ros-web.ru
81.9.63.29	A	ns2.centrhost.ru
81.9.63.71	A	mail.xn--80aapjlbdk1bw0d.xn--p1ai
81.9.63.71	A	forum.sunplay.ru
81.9.63.206	A	psfriends.net