Robtex

Up: 81.9.46.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.9.46.0/25
Down right: 81.9.46.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.9.46.194	A+PTR	kedi194.subscribe.ru
81.9.46.194	A	ns194b.subscribe.ru
81.9.46.194	A	gns194b.sendsay.ru
81.9.46.195	A+PTR	kedi195.subscribe.ru
81.9.46.195	A	gns195b.sendsay.ru
81.9.46.195	A	ns195b.subscribe.ru
81.9.46.233	A+PTR	kedi233.subscribe.ru
81.9.46.240	PTR	kedi240.subscribe.ru
81.9.46.240	A	ingos-send.ru
81.9.46.240	A	bsndsy.ru
81.9.46.242	PTR	kedi242.subscribe.ru
81.9.46.242	A	sendemails.ru
81.9.46.246	PTR	kedi246.subscribe.ru
81.9.46.246	A	wargaming.link.eu-email.wargaming.net
81.9.46.246	A	link.email.rbc.ru
81.9.46.247	A+PTR	kedi247.subscribe.ru
81.9.46.247	A	sendsay.pro
81.9.46.247	A	sendsai.ru
81.9.46.248	PTR	kedi248.subscribe.ru
81.9.46.248	A	image.emails.tinkoff.ru
81.9.46.248	A	image.sendsay.ru
81.9.46.249	A	api.sendsay.ru