Robtex

Up: 137.189.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 137.189.24.0/23
Down right: 137.189.26.0/23

IP	Type	Hostname
137.189.26.226	A+PTR	cusisocs.itsc.cuhk.edu.hk
137.189.27.2	PTR	ucsvc5.itsc.cuhk.edu.hk
137.189.27.95	A+PTR	tcufs.tad.cuhk.hk
137.189.27.103	A+PTR	p6156c3.itsc.cuhk.edu.hk
137.189.27.110	A+PTR	mc-dev1.cuhk.edu.hk
137.189.27.130	PTR	webappuat.itsc.cuhk.edu.hk
137.189.27.130	A	mail.ec-protect.com
137.189.27.151	A+PTR	pc27151.itsc.cuhk.edu.hk