Robtex

Up: 137.189.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 137.189.172.0/23
Down right: 137.189.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
137.189.172.8	PTR	project.com.cuhk.edu.hk
137.189.172.8	A	www.com.cuhk.edu.hk
137.189.172.9	A+PTR	ftp.com.cuhk.edu.hk
137.189.172.9	A	www.cschinese.net
137.189.172.9	A	cschinese.com
137.189.172.10	PTR	com.cuhk.edu.hk
137.189.172.11	PTR	www.com.cuhk.edu.hk
137.189.172.12	PTR	www2.com.cuhk.edu.hk
137.189.172.12	A	mail.cschinese.com
137.189.172.12	A	cschinese.net
137.189.172.14	PTR	scj.com.cuhk.edu.hk
137.189.172.15	PTR	alumni.com.cuhk.edu.hk
137.189.172.17	A+PTR	ebooking.com.cuhk.edu.hk
137.189.173.215	A	pc173215.na.cuhk.edu.hk
137.189.173.232	A	pc173232.na.cuhk.edu.hk
137.189.173.238	A	pc173238.na.cuhk.edu.hk
137.189.173.239	A+PTR	pc173239.na.cuhk.edu.hk
137.189.174.176	A+PTR	pc174176.tra.cuhk.edu.hk
137.189.174.194	A+PTR	pc174194.tra.cuhk.edu.hk
137.189.174.205	PTR	workshop.tra.cuhk.edu.hk
137.189.174.205	PTR	internal.tra.cuhk.edu.hk
137.189.174.205	PTR	dh.tra.cuhk.edu.hk
137.189.174.239	A+PTR	serverb.arts.cuhk.edu.hk
137.189.175.155	A+PTR	pmfe.lib.cuhk.edu.hk
137.189.175.158	A+PTR	ucl-1f-mfp1.lib.cuhk.edu.hk
137.189.175.163	A+PTR	ccl-gf-g2.lib.cuhk.edu.hk
137.189.175.209	A+PTR	ul-lg-mfpl1.lib.cuhk.edu.hk