Robtex

Up: 213.108.26.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.108.27.0/25
Down right: 213.108.27.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.108.27.1	A+PTR	gw-27.ams.network.unicenter.nl
213.108.27.3	A+PTR	vrrp2-27.ams.network.unicenter.nl
213.108.27.20	A	mail.deguardi.nl
213.108.27.20	A	mail.affiliate-banners.nl
213.108.27.20	A	deguardi.nl