Robtex

Up: 88.86.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 88.86.72.0/23
Down right: 88.86.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
88.86.72.0	PTR	subnet0x4.72.quantum.ru
88.86.72.4	PTR	subnet4x4.72.quantum.ru
88.86.72.4	A	mail.st35.ru
88.86.72.4	A	bmz35.ru
88.86.72.10	PTR	zabor.incomgroup.ru
88.86.72.16	PTR	subnet16x8.72.quantum.ru
88.86.72.16	A	mail.severfasad.ru
88.86.72.16	A	mx.severfasad.ru
88.86.72.22	PTR	vlgd-14arbitrag5.72.quantum.ru
88.86.72.50	PTR	mail.vpgaz.ru
88.86.72.98	A	kornet35.ru
88.86.72.106	A+PTR	ns1.vologda.softlab.ru
88.86.72.106	A	vologda.softlab.ru
88.86.72.113	A	rsgitlab.dyndns.org
88.86.72.124	PTR	mail.souzlesmontazh.ru
88.86.72.133	PTR	vlgd-sport.vologda.ptl.ru
88.86.72.182	PTR	mail.asuvmz.ru
88.86.72.202	PTR	www.vbf.ru
88.86.72.204	PTR	post.vbf.ru
88.86.74.6	PTR	6.74.vologda.ptl.ru
88.86.74.27	PTR	27.74.vologda.ptl.ru
88.86.74.42	PTR	42.74.vologda.ptl.ru
88.86.74.67	PTR	mx1.fm.iceberry.ru
88.86.74.67	A	mx2.fm.iceberry.ru
88.86.74.193	PTR	193.74.vologda.ptl.ru
88.86.75.255	PTR	255.75.vologda.ptl.ru