Robtex

Up: 194.45.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 194.45.16.0/22
Down right: 194.45.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
194.45.16.115	A	mail.horse-event.nl
194.45.16.164	A	mail.hoteleindhoven.com
194.45.17.249	PTR	static.kpn.net
194.45.17.249	A	remote.verenigdejeugdclubslimburg.nl
194.45.18.48	PTR	static.kpn.net
194.45.19.0	PTR	static.kpn.net
194.45.19.48	PTR	static.kpn.net
194.45.19.120	PTR	static.kpn.net
194.45.19.194	PTR	static.kpn.net
194.45.19.194	A	webmail.divosa.nl
194.45.19.194	A	mail.divosa.org
194.45.19.224	PTR	static.kpn.net
194.45.20.1	PTR	ns.evotec.com
194.45.20.2	PTR	gw.evotec.de
194.45.20.16	PTR	filetransfer.evotec.com
194.45.20.66	PTR	pegasus.evotec.com
194.45.20.68	A	mail1.euprotec.com
194.45.20.68	A	email2.evotec.com
194.45.20.192	A	targethunter.evotec.com
194.45.21.11	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.21.74	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.21.113	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.21.136	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.21.145	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.21.185	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.21.217	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.22.0	PTR	unassigned
194.45.22.2	PTR	unassigned
194.45.22.72	A+PTR	soa2.ilk.de
194.45.22.74	PTR	unassigned
194.45.22.74	A	dns-slave03.ilk.de
194.45.22.136	PTR	unassigned
194.45.23.27	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.23.32	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.23.154	PTR	unused-static-pa.de.kpn-eurorings.net
194.45.23.248	PTR	unused-static-pa.de.kpn-eurorings.net