Robtex

Up: 81.18.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.18.4.0/25
Down right: 81.18.4.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.18.4.3	A	hosting.wisdom.nl
81.18.4.3	A	ruim-baan.org
81.18.4.3	A	www.wisdom.nl
81.18.4.16	A	storemanager.nl
81.18.4.16	A	hutsefluts.nl
81.18.4.16	A	mx.gamecards.nl
81.18.4.29	A	php5-acc.wisdom.nl
81.18.4.47	A	clkdns.clockwork.nl