Robtex

Up: 91.211.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 91.211.16.0/23
Down right: 91.211.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.211.16.1	A+PTR	ns.didan.net.ua
91.211.16.1	A	ns1.didan.net.ua
91.211.16.6	A+PTR	bill.didan.org
91.211.16.14	PTR	ics.didan.net.ua
91.211.16.17	A	hanjenkovo-gw.didan.net.ua
91.211.16.18	A	hanjenkovo-18.didan.net.ua
91.211.16.34	A+PTR	holodnaya-balka.didan.net.ua
91.211.16.46	A+PTR	internet-flash.com
91.211.16.46	A	dc.internet-flash.com
91.211.16.46	A	vpn2.didan.net.ua
91.211.16.49	A	pautina-gw.didan.net.ua
91.211.16.50	PTR	pautina-net.com.ua
91.211.16.54	A	xnet.didan.net.ua
91.211.16.57	A+PTR	cisco10k.didan.net.ua
91.211.16.78	A	kirovskoe2.didan.net.ua
91.211.16.81	A	krynka-gw.didan.net.ua
91.211.16.126	A+PTR	cisco10k.didan.net.ua
91.211.16.133	A+PTR	hosting3.didan.net.ua
91.211.16.133	PTR	vcenter.didan.org
91.211.16.133	A	ring.didan.net.ua
91.211.16.135	A	drweb.didan.org
91.211.16.137	A+PTR	retracker.didan.org
91.211.16.140	PTR	aqua.didan.org
91.211.16.141	A+PTR	level-net.com
91.211.16.144	A+PTR	didan.org
91.211.16.144	A	www.didan.org
91.211.16.144	A	www.didan.com.ua
91.211.16.148	PTR	dhcp.didan.net.ua
91.211.16.156	A+PTR	ns2.didan.net.ua
91.211.16.156	A+PTR	sdns.didan.net.ua
91.211.16.160	A	khartsyzsk.net
91.211.16.160	A	hosting2.didan.net.ua
91.211.16.161	A	mail.didan.org.ua
91.211.16.162	A+PTR	torrent.dn.ua
91.211.16.164	A	kabinet.us
91.211.16.165	PTR	ldap.didan.org
91.211.16.165	A	forum.makeevka.ws
91.211.16.165	A	blog.didan.org
91.211.17.15	PTR	vpn-91-211-17-15.didan.com.ua
91.211.17.27	A+PTR	vpn-91-211-17-27.didan.com.ua
91.211.17.32	PTR	vpn-91-211-17-32.didan.com.ua
91.211.17.51	PTR	vpn-91-211-17-51.didan.com.ua
91.211.17.51	A	artmebel.com.ua
91.211.17.199	A+PTR	vpn-91-211-17-199.didan.com.ua
91.211.17.201	A+PTR	vpn-91-211-17-201.didan.com.ua
91.211.17.201	A	html5hex.com
91.211.17.202	A	xn--1-8sbah3dkgi3a7h.xn--p1ai
91.211.17.209	A+PTR	vpn-91-211-17-209.didan.com.ua
91.211.17.210	PTR	vpn-91-211-17-210.didan.com.ua
91.211.17.210	A	nik7.org
91.211.17.222	A+PTR	mail.amber.dn.ua
91.211.17.227	PTR	vpn-91-211-17-227.didan.com.ua
91.211.17.227	A	donetsk.molis.ua
91.211.18.3	PTR	vikstyle.info
91.211.18.8	PTR	vpn-91-211-18-8.didan.com.ua
91.211.18.8	A	khanaev.com
91.211.18.49	A	samonet.net
91.211.18.49	A	mail.samonet.net
91.211.18.129	PTR	ns1.zugres.net
91.211.18.129	A+PTR	zg-nas.didan.net.ua
91.211.18.130	PTR	ns.zugres.net
91.211.18.130	A+PTR	zg.didan.net.ua
91.211.19.140	A	r1.sn-qpq5obgv02-qo3e.googlevideo.com
91.211.19.255	PTR	vpn-91-211-19-255.didan.com.ua