Robtex

Up: 31.129.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 31.129.64.0/20
Down right: 31.129.80.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.129.64.1	A	smtp-out.dnepro.net
31.129.64.189	A	ip-31-64-189.dnepro.net
31.129.64.210	PTR	mail.dneprfg.com
31.129.64.210	A	dneprfg.com
31.129.64.210	A	mail2.dneprfg.com
31.129.65.9	PTR	ip-31-65-9.dnepro.net
31.129.65.45	PTR	ip-31-65-45.dnepro.net
31.129.65.69	A	ip-31-65-69.dnepro.net
31.129.65.151	A	ip-31-65-151.dnepro.net
31.129.65.152	A	ip-31-65-152.dnepro.net
31.129.65.153	A+PTR	ip-31-65-153.dnepro.net
31.129.66.205	PTR	ip-31-66-205.dnepro.net
31.129.67.3	A	russbestdate.ru
31.129.67.109	PTR	ip-31-67-109.dnepro.net
31.129.67.109	A	mail.agrodz.com.ua
31.129.67.109	A	agrodz.com.ua
31.129.68.4	A	ip-31-68-4.dnepro.net
31.129.68.29	PTR	ip-31-68-29.dnepro.net
31.129.68.42	A+PTR	ip-31-68-42.dnepro.net
31.129.68.164	PTR	ip-31-68-164.dnepro.net
31.129.68.190	A	mail1.keramet.com.ua
31.129.69.133	A	mail.tehnobyt.dn.ua
31.129.69.135	A+PTR	mss.dp.ua
31.129.70.19	A	ip-31-70-19.dnepro.net
31.129.70.23	A	ip-31-70-23.dnepro.net
31.129.70.25	A	iiceu.com
31.129.70.25	A	socialface.com.ua
31.129.70.65	A+PTR	ip-31-70-65.dnepro.net
31.129.71.85	A+PTR	ip-31-71-85.dnepro.net
31.129.73.73	A	xn--e1agaihechcuqe7g.xn--p1ai
31.129.73.73	A	l2style.ru
31.129.73.73	A	lin2mad.ru
31.129.75.16	A+PTR	mail1.varz.dp.ua
31.129.80.3	PTR	ip-31-80-3.dnepro.net
31.129.80.65	PTR	ip-31-80-65.dnepro.net
31.129.82.163	PTR	ip-31-82-163.dnepro.net
31.129.83.199	A	ip-31-83-199.dnepro.net
31.129.86.98	PTR	ip-31-86-98.dnepro.net
31.129.86.225	PTR	ip-31-86-225.dnepro.net
31.129.88.174	A+PTR	ip-31-88-174.dnepro.net
31.129.88.252	A+PTR	mail.norma.dp.ua
31.129.88.252	A	norma.dp.ua
31.129.89.248	A	ip-31-89-248.dnepro.net
31.129.91.9	PTR	ip-31-91-9.dnepro.net
31.129.91.27	PTR	ip-31-91-27.dnepro.net
31.129.91.27	A	getua.org
31.129.91.52	A	ip-31-91-52.dnepro.net
31.129.91.129	A+PTR	ip-31-91-129.dnepro.net
31.129.91.238	A+PTR	ip-31-91-238.dnepro.net
31.129.93.42	PTR	ip-31-93-42.dnepro.net
31.129.94.180	A+PTR	ip-31-94-180.dnepro.net
31.129.94.180	A	ns1.overflowwho.ru
31.129.94.180	A	ns3.loer555.org
31.129.95.173	A+PTR	ip-31-95-173.dnepro.net
31.129.95.173	A	cc.zartrusrokl.at
31.129.95.173	A	ns3.userdns.org
31.129.95.255	A+PTR	ip-31-95-255.dnepro.net