Robtex

Up: 210.0.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.0.216.0/23
Down right: 210.0.218.0/23

IP	Type	Hostname
210.0.216.4	A	dmhcsm.mysch.net
210.0.216.5	A	websams.dmhcsm.edu.hk
210.0.216.18	A	twghscgms.edu.hk
210.0.216.19	A	mail.twghscgms.edu.hk
210.0.216.27	A	www.twghscgms.edu.hk
210.0.216.35	A	www.slc.edu.hk
210.0.216.35	A	*.slc.edu.hk
210.0.216.39	A	websams.slc.edu.hk
210.0.216.40	A	mail.slc.edu.hk
210.0.216.53	PTR	hkbcps.edu.hk
210.0.216.54	A	www.hkbcps.edu.hk
210.0.216.54	A	hkbcps.edu.hk
210.0.216.56	PTR	hkbcps.edu.hk
210.0.216.56	A	mail.hkbcps.edu.hk
210.0.216.153	A	itschool.tjcec.edu.hk
210.0.216.209	A	net1.hsmc.edu.hk
210.0.216.246	A	plhks.edu.hk
210.0.217.210	A	baravinsedwin.com
210.0.217.211	A	ns1.elinkinter.net
210.0.217.212	A	ns2.elinkinter.net
210.0.217.216	A	mail.elinkinter.net
210.0.217.217	A	ns1.pikyu.com
210.0.217.217	A	ns2.pikyu.com
210.0.217.217	A	mail.pikyu.com
210.0.217.234	PTR	mail.rlphk.com
210.0.218.63	A	mail.eplhz.com
210.0.218.63	A	mail.normalien-prosperity.com
210.0.218.68	A	mail.siteco-prosperity.cn
210.0.218.69	A+PTR	smtp1.prosperitylamps.com
210.0.218.71	A+PTR	smtp.prosperitylamps.com
210.0.218.71	A	smtp.asialampindustry.com
210.0.218.72	A	dns2.asialampindustry.com
210.0.218.72	A	eplhz.com
210.0.218.72	A	dns2.prosperitylamps.com
210.0.219.49	PTR	bbs-49-219-0-210.on-nets.com
210.0.219.100	PTR	bbs-100-219-0-210.on-nets.com
210.0.219.113	PTR	bbs-113-219-0-210.on-nets.com
210.0.219.115	PTR	bbs-115-219-0-210.on-nets.com
210.0.219.155	PTR	bbs-155-219-0-210.on-nets.com