Robtex

Up: 101.6.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 101.6.0.0/18
Down right: 101.6.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
101.6.4.50	A+PTR	smtp26.tsinghua.edu.cn
101.6.4.51	A+PTR	smtp27.tsinghua.edu.cn
101.6.4.52	A+PTR	smtp28.tsinghua.edu.cn
101.6.4.54	A+PTR	smtp30.tsinghua.edu.cn
101.6.5.69	A	masters.sem.tsinghua.edu.cn
101.6.5.69	A	mis.sem.tsinghua.edu.cn
101.6.5.199	A	bcrc.cn
101.6.5.249	A	wesalon.cc
101.6.5.249	A	www.wesalon.cc
101.6.5.250	A	www.cers.edu.cn
101.6.6.172	A	0.cn.pool.ntp.org
101.6.6.172	A	dns1.tuna.tsinghua.edu.cn
101.6.6.219	A	graduates2019.tsinghua.edu.cn
101.6.6.219	A	www.cssb.tsinghua.edu.cn
101.6.8.6	A	iac.tsinghua.edu.cn
101.6.8.7	A	cloud.tsinghua.edu.cn
101.6.8.148	A	git-oauth.tsinghua.edu.cn
101.6.8.149	A	git.tsinghua.edu.cn
101.6.8.193	A	cdnmirrors.s.tuna.tsinghua.edu.cn
101.6.18.89	A	rapidejouer.ooo
101.6.24.20	A	mobileapp.tsinghua.edu.cn
101.6.31.6	A	tuna.tsinghua.edu.cn
101.6.32.201	A	www.comdyn.cn
101.6.32.201	A	*.cacm.cn
101.6.32.201	A	www.cacm.cn
101.6.33.24	A	aerothu.org
101.6.33.94	A	aerothu.org
101.6.33.139	A	www.aerothu.org
101.6.34.12	A	ipxy.net
101.6.34.97	A	ipxy.net
101.6.48.9	A	www.civil.edu.cn
101.6.52.87	A	thuweather.com
101.6.54.7	A	lifangti.net
101.6.54.27	A	dongfanghuayuan.com
101.6.54.27	A	unionlab.com.cn
101.6.54.28	A	hydrolink.org
101.6.57.38	A	mechinfo.me
101.6.61.4	A	dbgc.online
101.6.68.48	A	image.ee.tsinghua.edu.cn
101.6.94.12	A	www.futurechip.org
101.6.94.12	A	futurechip.org