Robtex

Up: 80.68.154.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 80.68.155.0/25
Down right: 80.68.155.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.68.155.36	A	mail.karupa.com
80.68.155.36	A	mail.blumatel.it
80.68.155.36	A	mail.karupa.it
80.68.155.37	A	ipanel.karupa.biz
80.68.155.41	PTR	mail.mangoadv.com
80.68.155.41	PTR	mail.roomize.com
80.68.155.41	A+PTR	mail.gomobile.it
80.68.155.42	A	mail.curiosinews.com
80.68.155.42	A	mail.quizzdujour.fr
80.68.155.42	A	mail.malattiestrane.com