Robtex

Up: 81.17.138.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.17.138.0/25
Down right: 81.17.138.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.17.138.2	A	ns1.amicusline.com
81.17.138.2	A	ns2.amicusline.com
81.17.138.2	A	amicusline.com
81.17.138.14	A+PTR	fuunster.com
81.17.138.18	PTR	rider.com.ua
81.17.138.18	A	www.rider.com.ua
81.17.138.18	A	photograf.rider.com.ua
81.17.138.38	PTR	tracker.uacyber.net
81.17.138.38	A	7560000.com.ua
81.17.138.42	A+PTR	mail.avia-tourism.com.ua
81.17.138.50	A	mail.irbis.ua
81.17.138.54	A+PTR	adap.com.ua
81.17.138.54	A	relay.adap.com.ua
81.17.138.54	A	relay1.adap.com.ua
81.17.138.58	A+PTR	mx.feskov.com.ua
81.17.138.58	A	mail.feskov.com
81.17.138.59	A	sana-med.com.ua
81.17.138.60	A	pbx.feskov.com
81.17.138.67	A+PTR	mail1.bigline.net
81.17.138.69	A	ns1.host-nameservers.com
81.17.138.94	PTR	relay.altera.ua
81.17.138.94	A	relay2.altera.ua
81.17.138.102	A	mebelmagazin.com
81.17.138.108	PTR	bestwal.com
81.17.138.108	A	ns1.topedgy.com
81.17.138.108	A	topedgy.com
81.17.138.109	A	ns2.topedgy.com
81.17.138.115	PTR	hosting4.bigline.net
81.17.138.115	A	add.in.ua
81.17.138.115	A	mail.video-sys.com.ua
81.17.138.116	A	ns116.bigline.net
81.17.138.117	A+PTR	ns2.hostoasis.net
81.17.138.136	A+PTR	atl161.greenstarmove.com
81.17.138.139	PTR	mancapture.net
81.17.138.146	A	revealedonstories.com
81.17.138.194	PTR	relay.hte.vl.net.ua
81.17.138.194	A	ns1.hts.kh.ua
81.17.138.194	A	relay2.hte.vl.net.ua
81.17.138.202	A+PTR	3w.aviti.net
81.17.138.203	A+PTR	silver.aviti.net
81.17.138.230	A+PTR	nag.bigline.net
81.17.138.230	A	bg.keum.com.ua
81.17.138.250	A+PTR	k-lab.bigline.net