Robtex

Up: 210.31.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 210.31.0.0/21
Down right: 210.31.8.0/21

IP	Type	Hostname
210.31.0.4	PTR	www.muc.edu.cn
210.31.0.8	A	dns2.muc.edu.cn
210.31.0.9	A	dns1.muc.edu.cn
210.31.0.9	A	muc.edu.cn
210.31.0.10	A+PTR	dns.muc.edu.cn
210.31.0.80	A	minzufa.com
210.31.4.58	A	pyb.muc.edu.cn
210.31.8.62	A	cwcx.muc.edu.cn
210.31.15.1	A	www.muc.edu.cn
210.31.15.54	A	cwcx.muc.edu.cn
210.31.15.253	A	sce.muc.edu.cn
210.31.15.254	A	minzuyiyao.com
210.31.15.254	A	minzuyiyao.muc.edu.cn
210.31.15.254	A	nginx.muc.edu.cn