Robtex

Up: 81.121.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 81.121.32.0/20
Down right: 81.121.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.121.32.1	PTR	host1-32-static.121-81-b.business.telecomitalia.it
81.121.32.1	A	sciascia.it
81.121.32.1	A	calvino.it
81.121.32.36	A	host36-32-static.121-81-b.business.telecomitalia.it
81.121.32.64	A	host64-32-static.121-81-b.business.telecomitalia.it
81.121.32.66	PTR	mail.keypass.it
81.121.32.66	A	mail.turbochargers.it
81.121.32.66	A	mail.turbomitsubishi.it
81.121.32.117	A	mail.monteparma.it
81.121.36.2	A	host2-36-static.121-81-b.business.telecomitalia.it
81.121.37.6	A	host6-37-static.121-81-b.business.telecomitalia.it
81.121.37.24	A	host24-37-static.121-81-b.business.telecomitalia.it
81.121.37.34	A+PTR	host34-37-static.121-81-b.business.telecomitalia.it
81.121.37.47	A	host47-37-static.121-81-b.business.telecomitalia.it
81.121.37.56	A	host56-37-static.121-81-b.business.telecomitalia.it
81.121.37.59	A	host59-37-static.121-81-b.business.telecomitalia.it
81.121.37.90	A	host90-37-static.121-81-b.business.telecomitalia.it
81.121.37.95	A	host95-37-static.121-81-b.business.telecomitalia.it
81.121.37.105	A	host105-37-static.121-81-b.business.telecomitalia.it
81.121.37.131	A+PTR	host131-37-static.121-81-b.business.telecomitalia.it
81.121.37.165	A	host165-37-static.121-81-b.business.telecomitalia.it
81.121.37.200	A	host200-37-static.121-81-b.business.telecomitalia.it
81.121.37.205	A	host205-37-static.121-81-b.business.telecomitalia.it
81.121.37.211	A	host211-37-static.121-81-b.business.telecomitalia.it
81.121.37.222	A	host222-37-static.121-81-b.business.telecomitalia.it
81.121.37.234	A	host234-37-static.121-81-b.business.telecomitalia.it
81.121.37.248	A	host248-37-static.121-81-b.business.telecomitalia.it