Robtex

Up: 143.89.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 143.89.16.0/22
Down right: 143.89.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
143.89.16.177	A	dsci1.math.ust.hk
143.89.17.101	A	malx11.math.ust.hk
143.89.17.101	A	math.ust.hk
143.89.17.184	A+PTR	www.math.ust.hk
143.89.17.185	PTR	ssms01.math.ust.hk
143.89.17.185	A	www.cdgt.ust.hk
143.89.17.185	A	edp.ust.hk
143.89.17.192	A+PTR	db.math.ust.hk
143.89.17.192	A	www.mathdb.org
143.89.17.192	A	mathdb.org
143.89.17.253	A	dns.math.ust.hk
143.89.18.173	PTR	pha023.phys.ust.hk
143.89.18.173	A	www.baijia.info
143.89.19.18	PTR	phzm18.phys.ust.hk
143.89.19.18	A	physics.ust.hk
143.89.19.190	A+PTR	phz606.phys.ust.hk
143.89.19.253	A+PTR	dns.phys.ust.hk
143.89.20.89	A	iez089.ielm.ust.hk
143.89.20.91	A+PTR	iez091.ieem.ust.hk
143.89.20.91	A+PTR	iez091.ielm.ust.hk
143.89.20.139	A	iey004.ielm.ust.hk
143.89.21.64	A	iec043.ielm.ust.hk
143.89.21.70	A	iec049.ielm.ust.hk
143.89.21.79	A	iec058.ieem.ust.hk
143.89.21.86	A	iec065.ielm.ust.hk
143.89.21.89	A	iec068.ieem.ust.hk
143.89.21.93	A	ieb022.ielm.ust.hk
143.89.21.93	A	ieb022.ieem.ust.hk
143.89.21.116	A	iey125.ielm.ust.hk
143.89.21.116	A	iey125.ieem.ust.hk
143.89.21.126	A	cirp2012.com
143.89.21.133	A	iems10.ieem.ust.hk
143.89.21.136	A+PTR	iey141.ieem.ust.hk
143.89.21.136	PTR	iey141.ielm.ust.hk
143.89.21.149	A	ieem.ust.hk
143.89.21.149	A	ielm.ust.hk
143.89.21.149	A	iesu5.ieem.ust.hk
143.89.21.176	A	iey095.ielm.ust.hk
143.89.21.187	PTR	iey102.ieem.ust.hk
143.89.21.187	PTR	iey102.ielm.ust.hk
143.89.21.187	A	cybersickness.org
143.89.21.195	A	iey110.ieem.ust.hk
143.89.21.252	A	hkustdc1-ie.ielm.ust.hk
143.89.21.253	A	dns.ieem.ust.hk
143.89.21.253	A	dns.ielm.ust.hk
143.89.22.166	A+PTR	cez042.ce.ust.hk
143.89.22.166	A	akirakan.com
143.89.23.113	A+PTR	cez257.ce.ust.hk
143.89.23.113	A	mail.iasdm.org
143.89.23.113	A	www.iasdm.org
143.89.23.210	A	cez171.ce.ust.hk
143.89.23.253	A+PTR	dns.ce.ust.hk