Robtex

Up: 103.99.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.99.72.0/23
Down right: 103.99.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.99.72.17	A	trip.com
103.99.72.17	A	ctrip.co.kr
103.99.72.17	A	ctrip.com.hk
103.99.72.20	A	ctslb-oy50-02-osonly.ctripgslb.com
103.99.72.23	A	ctslb-oy50-02-osonly.ctripgslb.com
103.99.74.2	A+PTR	dynastar.net.cn