Robtex

Up: 193.141.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 193.141.12.0/23
Down right: 193.141.14.0/23

IP	Type	Hostname
193.141.12.42	PTR	static.kpn.net
193.141.12.82	PTR	static.kpn.net
193.141.12.167	PTR	static.kpn.net
193.141.13.2	PTR	static.kpn.net
193.141.13.3	PTR	mail.summit.nl
193.141.13.139	PTR	smtp.de-passerel.nl
193.141.13.235	A	mail.adams.nl
193.141.14.35	PTR	static.kpn.net
193.141.14.127	PTR	static.kpn.net
193.141.14.207	PTR	static.kpn.net
193.141.14.208	PTR	static.kpn.net
193.141.15.12	PTR	static.kpn.net
193.141.15.20	PTR	static.kpn.net
193.141.15.66	PTR	static.kpn.net
193.141.15.67	PTR	static.kpn.net
193.141.15.77	PTR	static.kpn.net
193.141.15.169	PTR	static.kpn.net
193.141.15.174	PTR	static.kpn.net
193.141.15.186	PTR	static.kpn.net
193.141.15.245	PTR	static.kpn.net