Robtex

Up: 31.193.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.193.16.0/25
Down right: 31.193.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.193.16.1	PTR	m1.penteres.it
31.193.16.9	PTR	bgp1-mix.vl50.backbone.timenet.it
31.193.16.11	A+PTR	ns3.penteres.it
31.193.16.11	A	rd1.penteres.it
31.193.16.11	A	ns-p.lucomp.net
31.193.16.12	A	d12.penteres.it
31.193.16.13	A+PTR	smtp3.penteres.it
31.193.16.13	A	smtp.penteres.it
31.193.16.13	A	mail.xdslnet.it
31.193.16.37	PTR	mi6-mi7.net.timenet.it
31.193.16.53	PTR	mi4-mi2.net.timenet.it
31.193.16.61	PTR	mi21-mi6.net.timenet.it