Robtex

Up: 194.121.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 194.121.84.0/23
Down right: 194.121.86.0/23

IP	Type	Hostname
194.121.84.14	PTR	static.kpn.net
194.121.84.34	PTR	static.kpn.net
194.121.85.19	A	mail5.transtrend.com
194.121.85.22	A	rd1.transtrend.com
194.121.85.211	A	mail.itpp.nl
194.121.87.82	PTR	dsl2.compricon.nl