Robtex

Up: 87.215.38.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 87.215.38.0/25
Down right: 87.215.38.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.215.38.68	PTR	unlabelled-68-38.215.87.versatel.net
87.215.38.75	A+PTR	mail.acm.nl
87.215.38.75	A	mail3.acm.nl
87.215.38.75	A	mail2.acm.nl
87.215.38.178	A+PTR	remote.strootman.com
87.215.38.219	A	mail.gerardmauritz.com