Robtex

Up: 87.239.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 87.239.28.0/25
Down right: 87.239.28.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.239.28.2	A	mail.bixis.net
87.239.28.14	A	mail.9358855.ru
87.239.28.40	PTR	87.239.28.40.inetcom.ru
87.239.28.115	PTR	mail2.simvol7.com
87.239.28.115	A	simvol7.com
87.239.28.122	PTR	mail.optim-m.ru
87.239.28.138	A+PTR	kl.liontex.ru
87.239.28.138	A	email.xn--e1afhblfyf.xn--p1ai
87.239.28.138	A	po.liontex.ru
87.239.28.158	PTR	87.239.28.158.inetcom.ru
87.239.28.182	PTR	87.239.28.182.inetcom.ru
87.239.28.182	A	www.apk-e.ru
87.239.28.182	A	distkontrol.ru
87.239.28.190	A+PTR	mx.tkline.ru
87.239.28.198	PTR	87.239.28.198.inetcom.ru