Robtex

Up: 203.70.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.70.252.0/23
Down right: 203.70.254.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.70.252.0	PTR	h0-203-70-252.adsl.dynamic.seed.net.tw
203.70.254.0	PTR	sw70-254-0.adsl.dynamic.seed.net.tw
203.70.254.135	PTR	sw70-254-135.adsl.dynamic.seed.net.tw
203.70.254.233	PTR	sw70-254-233.adsl.dynamic.seed.net.tw
203.70.254.233	A	ns1.ns6.ns5.ombugew.com
203.70.255.139	A	sw70-255-139.adsl.seed.net.tw
203.70.255.183	PTR	sw70-255-183.adsl.seed.net.tw
203.70.255.183	A	ns6.ns5.ns3.ombugew.com
203.70.255.183	A	ns6.ns1.ombugew.com
203.70.255.255	PTR	sw70-255-255.adsl.seed.net.tw