Robtex

Up: 210.66.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.66.32.0/23
Down right: 210.66.34.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.66.32.236	A+PTR	vic1.vic.com.tw
210.66.33.230	PTR	gemtech.com.tw
210.66.33.230	PTR	gem-exchange.gemtech.com.tw
210.66.33.230	PTR	gemtech12.gemtech.com.tw
210.66.33.234	PTR	gem-spam.gemtech.com.tw
210.66.33.234	PTR	gemtech-sqr.gemtech.com.tw