Robtex

Up: 192.50.108.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.50.109.0/25
Down right: 192.50.109.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.50.109.2	PTR	zel-us.jpcert.cc
192.50.109.2	A	zel.jpcert.cc
192.50.109.2	A	ns2.m4i.org
192.50.109.37	A+PTR	resv.jpcert.cc
192.50.109.39	A+PTR	live.jpcert.cc
192.50.109.40	A+PTR	shinoda-utils.jpcert.cc
192.50.109.49	A+PTR	polycom.jpcert.cc
192.50.109.50	A+PTR	monhun.jpcert.cc
192.50.109.54	A+PTR	virnos.jpcert.cc
192.50.109.57	PTR	sb-devel.jpcert.cc
192.50.109.57	A	vamp.jpcert.cc
192.50.109.59	A+PTR	www.floodeye.net
192.50.109.62	A+PTR	jaisco.jpcert.cc
192.50.109.65	A+PTR	shinoda-ns.jpcert.cc
192.50.109.70	PTR	sindan.jpcert.cc
192.50.109.70	A	yuffie.jpcert.cc
192.50.109.73	A+PTR	vmrouter.jpcert.cc
192.50.109.75	PTR	aristo.jpcert.cc
192.50.109.75	A	smtp.jais.co
192.50.109.86	A+PTR	sp-vc-con.jpcert.cc
192.50.109.88	A+PTR	sp-hv2-con.jpcert.cc
192.50.109.101	A+PTR	us-dhcp101.jpcert.cc
192.50.109.109	A+PTR	us-dhcp109.jpcert.cc
192.50.109.113	A+PTR	us-dhcp113.jpcert.cc
192.50.109.125	A+PTR	us-dhcp125.jpcert.cc
192.50.109.130	A+PTR	zel-wl.jpcert.cc
192.50.109.131	A+PTR	scc-dev.jpcert.cc
192.50.109.135	PTR	reserved.jpcert.cc
192.50.109.139	PTR	reserved.jpcert.cc
192.50.109.139	A	wlap-melco-i27.jpcert.cc
192.50.109.143	A+PTR	wl-dhcp143.jpcert.cc
192.50.109.144	A+PTR	wl-dhcp144.jpcert.cc
192.50.109.150	A+PTR	wl-dhcp150.jpcert.cc
192.50.109.155	A+PTR	wl-dhcp155.jpcert.cc
192.50.109.158	A+PTR	wl-dhcp158.jpcert.cc
192.50.109.159	A+PTR	wl-dhcp159.jpcert.cc
192.50.109.163	A+PTR	wl-dhcp163.jpcert.cc
192.50.109.171	A+PTR	wl-dhcp171.jpcert.cc
192.50.109.175	A+PTR	wl-dhcp175.jpcert.cc
192.50.109.177	A+PTR	wl-dhcp177.jpcert.cc
192.50.109.181	A+PTR	wl-dhcp181.jpcert.cc
192.50.109.184	A+PTR	wl-dhcp184.jpcert.cc
192.50.109.227	PTR	esxi-a.jpcert.cc
192.50.109.227	A	jokarimc.jpcert.cc
192.50.109.229	A+PTR	m1-vcenter.jpcert.cc
192.50.109.252	PTR	reserved.jpcert.cc