Robtex

Up: 137.189.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 137.189.40.0/22
Down right: 137.189.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
137.189.40.1	A+PTR	mx.phy.cuhk.edu.hk
137.189.40.1	A	mx.hk-phy.org
137.189.40.6	A	ns1.hk-phy.org
137.189.40.6	A	axps1.phy.cuhk.edu.hk
137.189.40.16	A+PTR	dhcp40-16.phy.cuhk.edu.hk
137.189.40.17	A+PTR	cluster3.phy.cuhk.edu.hk
137.189.40.26	PTR	dhcp40-26.phy.cuhk.edu.hk
137.189.40.29	A	hbli-nas-idac.phy.cuhk.edu.hk
137.189.40.31	A	hbli-nas3.phy.cuhk.edu.hk
137.189.40.37	A	dirac.phy.cuhk.edu.hk
137.189.40.46	A	jygpu.phy.cuhk.edu.hk
137.189.40.51	A+PTR	pc51.phy.cuhk.edu.hk
137.189.40.51	A	xdxiao.phy.cuhk.edu.hk
137.189.40.52	A	xdxiao.phy.cuhk.edu.hk
137.189.40.58	A+PTR	pc58.phy.cuhk.edu.hk
137.189.40.62	A	ljm1522.phy.cuhk.edu.hk
137.189.40.69	A	life4love.org
137.189.40.71	A	life4love.org
137.189.40.71	A	j71.phy.cuhk.edu.hk
137.189.40.73	A+PTR	jfwang.phy.cuhk.edu.hk
137.189.40.75	A+PTR	pc75.phy.cuhk.edu.hk
137.189.40.80	A+PTR	pc80.phy.cuhk.edu.hk
137.189.40.88	A	pc88.phy.cuhk.edu.hk
137.189.40.92	A	pc92.phy.cuhk.edu.hk
137.189.40.119	A	pc119.phy.cuhk.edu.hk
137.189.40.120	A+PTR	pc120.phy.cuhk.edu.hk
137.189.40.121	A+PTR	pc121.phy.cuhk.edu.hk
137.189.40.143	A	pc143.phy.cuhk.edu.hk
137.189.40.154	A+PTR	pc154.phy.cuhk.edu.hk
137.189.40.159	A	pc159.phy.cuhk.edu.hk
137.189.40.174	A	pc174.phy.cuhk.edu.hk
137.189.40.175	A	pc175.phy.cuhk.edu.hk
137.189.40.190	A	nas322.phy.cuhk.edu.hk
137.189.40.232	A+PTR	wifi-126.phy.cuhk.edu.hk
137.189.40.242	A+PTR	pc242.phy.cuhk.edu.hk
137.189.40.245	A	pc245.phy.cuhk.edu.hk
137.189.41.2	A+PTR	www.phy.cuhk.edu.hk
137.189.41.2	A	www.hk-phy.org
137.189.41.2	A	sun.phy.cuhk.edu.hk
137.189.41.19	A+PTR	dhcp41-19.phy.cuhk.edu.hk
137.189.41.21	A	pc41-21.phy.cuhk.edu.hk
137.189.41.33	A+PTR	dhcp41-33.phy.cuhk.edu.hk
137.189.41.34	A+PTR	dhcp41-34.phy.cuhk.edu.hk
137.189.41.36	A	dhcp41-36.phy.cuhk.edu.hk
137.189.41.48	A+PTR	intel1.phy.cuhk.edu.hk
137.189.41.53	A	dhcp41-53.phy.cuhk.edu.hk
137.189.41.56	A+PTR	dhcp41-56.phy.cuhk.edu.hk
137.189.41.61	A	dhcp41-61.phy.cuhk.edu.hk
137.189.41.63	A	dhcp41-63.phy.cuhk.edu.hk
137.189.41.69	A	intel19.phy.cuhk.edu.hk
137.189.41.73	PTR	pmhui-group.phy.cuhk.edu.hk
137.189.41.73	A	hwxu.net
137.189.41.79	A	intel28.phy.cuhk.edu.hk
137.189.41.83	A+PTR	intel32.phy.cuhk.edu.hk
137.189.41.84	A	intel33.phy.cuhk.edu.hk
137.189.41.86	A	intel35.phy.cuhk.edu.hk
137.189.41.88	A+PTR	intel37.phy.cuhk.edu.hk
137.189.41.89	PTR	pc41-89.phy.cuhk.edu.hk
137.189.41.90	A+PTR	intel39.phy.cuhk.edu.hk
137.189.41.95	A	intel44.phy.cuhk.edu.hk
137.189.41.99	PTR	pc41-99.phy.cuhk.edu.hk
137.189.41.101	A	pion.phy.cuhk.edu.hk
137.189.41.102	A	dhcp41-102.phy.cuhk.edu.hk
137.189.41.105	A+PTR	dhcp41-105.phy.cuhk.edu.hk
137.189.41.106	A+PTR	326cam.phy.cuhk.edu.hk
137.189.41.108	A	dhcp41-108.phy.cuhk.edu.hk
137.189.41.113	A+PTR	dhcp41-113.phy.cuhk.edu.hk
137.189.41.115	PTR	pc41-115.phy.cuhk.edu.hk
137.189.41.123	A+PTR	dhcp41-123.phy.cuhk.edu.hk
137.189.41.124	A	dhcp41-124.phy.cuhk.edu.hk
137.189.41.129	A+PTR	pc1129.phy.cuhk.edu.hk
137.189.41.136	A+PTR	pc1136.phy.cuhk.edu.hk
137.189.41.142	A	dhcp41-142.phy.cuhk.edu.hk
137.189.41.145	A+PTR	pc1145.phy.cuhk.edu.hk
137.189.41.146	A+PTR	g31nas6.phy.cuhk.edu.hk
137.189.41.150	A	dhcp41-150.phy.cuhk.edu.hk
137.189.41.151	A	dhcp41-151.phy.cuhk.edu.hk
137.189.41.153	A+PTR	dhcp41-153.phy.cuhk.edu.hk
137.189.41.156	A	dhcp41-156.phy.cuhk.edu.hk
137.189.41.161	PTR	pc41-161.phy.cuhk.edu.hk
137.189.41.163	A+PTR	sfg.phy.cuhk.edu.hk
137.189.41.168	A+PTR	dhcp41-168.phy.cuhk.edu.hk
137.189.41.169	PTR	dhcp41-169.phy.cuhk.edu.hk
137.189.41.180	A	pc1180.phy.cuhk.edu.hk
137.189.41.183	A	pc1183.phy.cuhk.edu.hk
137.189.41.184	A+PTR	pc1184.phy.cuhk.edu.hk
137.189.41.186	A	cuphysoc.com
137.189.41.190	A	dhcp41-190.phy.cuhk.edu.hk
137.189.41.191	A	dhcp41-191.phy.cuhk.edu.hk
137.189.41.193	A+PTR	dhcp41-193.phy.cuhk.edu.hk
137.189.41.196	A	dhcp41-196.phy.cuhk.edu.hk
137.189.41.203	PTR	pc41-203.phy.cuhk.edu.hk
137.189.41.205	A	dhcp41-205.phy.cuhk.edu.hk
137.189.41.206	A	pc41-206.phy.cuhk.edu.hk
137.189.41.208	A+PTR	dhcp41-208.phy.cuhk.edu.hk
137.189.41.210	A+PTR	dhcp41-210.phy.cuhk.edu.hk
137.189.41.211	A+PTR	dhcp41-211.phy.cuhk.edu.hk
137.189.41.213	A	dhcp41-213.phy.cuhk.edu.hk
137.189.41.223	A	pc41-223.phy.cuhk.edu.hk
137.189.41.225	A+PTR	pc41-225.phy.cuhk.edu.hk
137.189.41.226	A+PTR	pc41-226.phy.cuhk.edu.hk
137.189.41.228	A	pc41-228.phy.cuhk.edu.hk
137.189.41.239	A	pc41-239.phy.cuhk.edu.hk
137.189.41.242	A+PTR	pc41-242.phy.cuhk.edu.hk
137.189.41.243	A+PTR	pc41-243.phy.cuhk.edu.hk
137.189.41.246	A	pc41-246.phy.cuhk.edu.hk
137.189.41.247	A	pc41-247.phy.cuhk.edu.hk
137.189.41.248	A+PTR	pc41-248.phy.cuhk.edu.hk
137.189.41.251	A+PTR	itsc-0.phy.cuhk.edu.hk
137.189.41.252	A	itsc-1.phy.cuhk.edu.hk
137.189.42.11	A	icm.cuhk.edu.hk
137.189.42.11	A	icmserv1.icm.cuhk.edu.hk
137.189.42.51	A	icm.cuhk.edu.hk
137.189.42.51	A	icmserv2.icm.cuhk.edu.hk
137.189.43.20	A	vipbarcode.org
137.189.43.83	A	bac-srna.org
137.189.43.85	A	biocomputer.bio.cuhk.edu.hk
137.189.43.208	A	wildsoydb.org
137.189.43.221	A	bac-srna.org
137.189.46.197	A+PTR	dsb.sbs.cuhk.edu.hk
137.189.46.211	A+PTR	www.mdl.cuhk.edu.hk
137.189.46.211	A+PTR	essu.sbs.cuhk.edu.hk
137.189.46.221	A+PTR	brain.mdl.cuhk.edu.hk
137.189.47.182	A+PTR	gecko.sbs.cuhk.edu.hk
137.189.47.213	A+PTR	exch1-sbs.sbs.cuhk.edu.hk
137.189.47.213	A+PTR	webmail.sbs.cuhk.edu.hk
137.189.47.221	A+PTR	chameleon.mdl.cuhk.edu.hk