Robtex

Up: 210.66.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.66.52.0/23
Down right: 210.66.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.66.54.71	PTR	mail.solidtech.com.tw
210.66.54.72	PTR	mail.solidtech.com.tw
210.66.54.87	PTR	mail.hispeed.com.tw
210.66.54.87	A	hispeed.com.tw
210.66.54.120	A+PTR	mail.pcnet-cable.com.tw
210.66.54.120	A	mail.lacsoncabling.com
210.66.54.129	PTR	www.asix.com.tw
210.66.54.164	PTR	kingsoftware.com.tw
210.66.54.166	PTR	h166-210-66-54.asix.com.tw
210.66.54.166	A	kingsoftware.com.tw
210.66.55.17	PTR	a-optronics.com.tw
210.66.55.18	PTR	a-optronics.com.tw
210.66.55.39	PTR	mail.fay.com.tw
210.66.55.140	PTR	h140-210-66-55.cyntec.com
210.66.55.140	A	cyndns2.cyntec.com
210.66.55.167	A	ms2.charity.org.tw
210.66.55.209	A	yummy.price.com.tw
210.66.55.211	PTR	falcon4.price.com.tw
210.66.55.228	A	fedmachine.com
210.66.55.240	A+PTR	orangemarket.net
210.66.55.240	A	mail.orangemarket.net
210.66.55.246	PTR	h246-210-66-55.uteik.com.tw
210.66.55.246	A	uteik.com.tw
210.66.55.246	A	mail.uteik.com.tw