Robtex

Up: 166.111.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 166.111.4.0/25
Down right: 166.111.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
166.111.4.5	A+PTR	dns.cic.tsinghua.edu.cn
166.111.4.5	A	dns.meng.edu.cn
166.111.4.5	A	dns.sppm.tsinghua.edu.cn
166.111.4.8	A	zhjw.cic.tsinghua.edu.cn
166.111.4.8	A	academic.tsinghua.edu.cn
166.111.4.8	A	yz.d.tsinghua.edu.cn
166.111.4.17	A	learn.cic.tsinghua.edu.cn
166.111.4.17	A	learn.tsinghua.edu.cn
166.111.4.21	A	www.itsinghua.com
166.111.4.21	A	itsinghua.com
166.111.4.21	A	www.itsinghua.edu.cn
166.111.4.23	PTR	mailx.cic.tsinghua.edu.cn
166.111.4.23	A	mail.cic.tsinghua.edu.cn
166.111.4.23	A	cic.tsinghua.edu.cn
166.111.4.29	A	news.tsinghua.edu.cn
166.111.4.30	A+PTR	dns2.cic.tsinghua.edu.cn
166.111.4.30	A	dns2.chemeng.tsinghua.edu.cn
166.111.4.30	A	dns2.cls.edu.cn
166.111.4.40	A+PTR	auth.cic.tsinghua.edu.cn
166.111.4.49	A	zhaopin.rsc.tsinghua.edu.cn
166.111.4.65	A	www.tsinghua.org.cn
166.111.4.74	A	dest.tsinghua.edu.cn
166.111.4.75	A	oamail.tsinghua.edu.cn
166.111.4.79	A	learnnotice.cic.tsinghua.edu.cn
166.111.4.79	A	rsc.tsinghua.edu.cn
166.111.4.79	A	thos.tsinghua.edu.cn
166.111.4.86	A	yqgx.tsinghua.edu.cn
166.111.4.91	A	misapp.tsinghua.edu.cn
166.111.4.93	A	map.d.tsinghua.edu.cn
166.111.4.93	A	map.tsinghua.edu.cn
166.111.4.94	A	portal.tsinghua.edu.cn
166.111.4.98	A	info.tsinghua.edu.cn
166.111.4.100	PTR	www.tsinghua.edu.cn
166.111.4.100	A	www.d.tsinghua.edu.cn
166.111.4.100	A	www.ime.tsinghua.edu.cn
166.111.4.120	A	wsus.cic.tsinghua.edu.cn
166.111.4.136	A	sysc.tsinghua.edu.cn
166.111.4.193	A	student.tsinghua.edu.cn
166.111.4.215	A	85001.tsinghua.edu.cn
166.111.4.232	A	ecard.tsinghua.edu.cn