Robtex

Up: 213.251.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.251.193.0/25
Down right: 213.251.193.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.251.193.4	PTR	mail.p4ta.ru
213.251.193.4	A	best10games.ru
213.251.193.4	A	4b770.nhjfbz.com
213.251.193.5	PTR	n006.nline.ru
213.251.193.7	PTR	rt.nline.ru
213.251.193.8	A+PTR	osmp.nline.ru
213.251.193.34	A	ns.secon.net.ru