Robtex

Up: 210.68.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.68.68.0/23
Down right: 210.68.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.68.68.255	A+PTR	210-68-68-255.adsl.dynamic.seed.net.tw
210.68.69.82	PTR	h82-210-68-69.seastarship.com
210.68.70.32	PTR	smtp.scentasia.com.tw
210.68.70.53	PTR	h53-210-68-70.pvp.com.tw
210.68.70.53	A	mail.bdo.com.tw
210.68.70.57	PTR	noble.com.tw
210.68.70.57	PTR	mail.noble.com.tw
210.68.70.92	A	www.qualitix.com.tw
210.68.70.110	A+PTR	lxsmtp.tekcon.com.tw
210.68.70.110	A+PTR	ns1.tekcon.com.tw
210.68.70.110	A	tekcon.com.tw
210.68.70.112	A+PTR	mail.tekcon.com.tw
210.68.70.112	PTR	ns2.tekcon.com.tw
210.68.70.113	PTR	h113-210-68-70.pvp.com.tw
210.68.70.114	PTR	h114-210-68-70.pvp.com.tw
210.68.70.124	A+PTR	jay.howardstudy.com.tw
210.68.70.124	A	www.howardstudy.com.tw
210.68.70.124	A	eslstudy.com.tw
210.68.70.134	PTR	h134-210-68-70.aztec.com.tw
210.68.70.159	PTR	h159-210-68-70.aztec.com.tw
210.68.70.160	A+PTR	mail.seraphim.com.tw
210.68.70.160	A	dns3.advancechina.com.hk
210.68.70.160	A	dns2.seraphim.com.tw
210.68.70.161	PTR	dns3.seraphim.com.tw
210.68.70.161	A	www.seraphim.com.hk
210.68.70.166	A+PTR	mail.advancechina.com.hk
210.68.70.167	A+PTR	router.seraphim.com.tw
210.68.70.168	PTR	h168-210-68-70.intrend.com.tw
210.68.70.195	A+PTR	mail.hctt.com.tw
210.68.70.195	A	hctt.com.tw
210.68.71.35	A	ns1.formosa-audio.com
210.68.71.77	A	dns.ds-tax.com.tw
210.68.71.77	A	ds-tax.com.tw
210.68.71.105	PTR	h105-210-68-71.seed.net.tw
210.68.71.113	PTR	h113-210-68-71.seed.net.tw
210.68.71.113	A	mail.yohofate.com
210.68.71.174	A+PTR	drinks.com.tw
210.68.71.174	A	mail.drinks.com.tw