Robtex

Up: 87.18.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 87.18.0.0/20
Down right: 87.18.16.0/20

IP	Type	Hostname
87.18.0.1	PTR	host1-0-dynamic.18-87-r.retail.telecomitalia.it
87.18.2.2	PTR	host2-2-dynamic.18-87-r.retail.telecomitalia.it
87.18.6.64	PTR	host64-6-dynamic.18-87-r.retail.telecomitalia.it
87.18.9.65	PTR	host65-9-dynamic.18-87-r.retail.telecomitalia.it
87.18.16.160	PTR	host160-16-dynamic.18-87-r.retail.telecomitalia.it
87.18.18.192	PTR	host192-18-dynamic.18-87-r.retail.telecomitalia.it
87.18.22.192	PTR	host192-22-dynamic.18-87-r.retail.telecomitalia.it
87.18.23.225	PTR	host225-23-dynamic.18-87-r.retail.telecomitalia.it
87.18.27.2	PTR	host2-27-dynamic.18-87-r.retail.telecomitalia.it
87.18.29.160	PTR	host160-29-dynamic.18-87-r.retail.telecomitalia.it
87.18.29.227	PTR	host227-29-dynamic.18-87-r.retail.telecomitalia.it