Robtex

Up: 210.66.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.66.16.0/23
Down right: 210.66.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.66.16.19	A+PTR	mail.flagship.com.tw
210.66.16.48	PTR	210.66.16.48.prassion.com.tw
210.66.16.48	A	www.prassion.com.tw
210.66.16.48	A	prassion.com
210.66.16.56	PTR	mail.sunlife.com.tw
210.66.16.57	PTR	mail.sunlife.com.tw
210.66.16.58	PTR	mail.sunlife.com.tw
210.66.16.59	PTR	210.66.16.59.eri.com.tw
210.66.16.59	A	16.61.eri.com.tw
210.66.16.59	A	*.16.59.eri.com.tw
210.66.16.61	PTR	210.66.16.61.eri.com.tw
210.66.16.61	A	mail02.eri.com.tw
210.66.16.67	PTR	mx.cnr.com.tw
210.66.16.67	A	mail.clientview.com
210.66.16.77	PTR	kupo.com.tw
210.66.16.107	A	ecp.oceannet.com.tw
210.66.16.163	A	www.phonisys.com.tw
210.66.16.174	A	hankco.com.tw
210.66.16.227	A	aswan-safety.com.tw
210.66.16.228	A	www.aswan-safety.com.tw
210.66.16.249	A	hostmaster.catzplay.net
210.66.16.249	A	catzplay.net
210.66.16.249	A	*.catzplay.net