Robtex

Up: 89.21.208.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 89.21.216.0/22
Down right: 89.21.220.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.21.216.126	PTR	host126-216-21-89.convergenze.it
89.21.217.9	PTR	host9-217-21-89.convergenze.it
89.21.217.10	PTR	host10-217-21-89.convergenze.it
89.21.218.18	PTR	host18-218-21-89.convergenze.it
89.21.218.18	A	quing.it
89.21.218.18	A	cilentopedia.net
89.21.218.169	PTR	host169-218-21-89.convergenze.it
89.21.218.169	A	royalsport.it
89.21.218.169	A	www.royalsport.it
89.21.219.4	PTR	host4-219-21-89.convergenze.it
89.21.219.10	PTR	host10-219-21-89.convergenze.it
89.21.219.18	PTR	host18-219-21-89.convergenze.it
89.21.219.25	A	champion.dyndns.org
89.21.219.32	PTR	host32-219-21-89.convergenze.it
89.21.219.42	PTR	host42-219-21-89.convergenze.it
89.21.219.43	PTR	host43-219-21-89.convergenze.it
89.21.219.57	PTR	host57-219-21-89.convergenze.it
89.21.219.64	PTR	host64-219-21-89.convergenze.it
89.21.219.66	PTR	host66-219-21-89.convergenze.it
89.21.219.80	PTR	host80-219-21-89.convergenze.it
89.21.219.96	PTR	host96-219-21-89.convergenze.it
89.21.219.112	PTR	host112-219-21-89.convergenze.it
89.21.219.122	PTR	host122-219-21-89.convergenze.it
89.21.219.128	PTR	host128-219-21-89.convergenze.it
89.21.219.129	PTR	host129-219-21-89.convergenze.it
89.21.219.146	PTR	host146-219-21-89.convergenze.it
89.21.219.147	PTR	host147-219-21-89.convergenze.it
89.21.219.153	PTR	host153-219-21-89.convergenze.it
89.21.219.154	PTR	host154-219-21-89.convergenze.it
89.21.219.160	PTR	host160-219-21-89.convergenze.it
89.21.219.163	PTR	host163-219-21-89.convergenze.it
89.21.219.170	PTR	host170-219-21-89.convergenze.it
89.21.219.177	PTR	host177-219-21-89.convergenze.it
89.21.219.187	PTR	host187-219-21-89.convergenze.it
89.21.219.195	PTR	host195-219-21-89.convergenze.it
89.21.219.211	PTR	host211-219-21-89.convergenze.it
89.21.219.218	PTR	host218-219-21-89.convergenze.it
89.21.219.226	PTR	host226-219-21-89.convergenze.it
89.21.219.235	PTR	host235-219-21-89.convergenze.it
89.21.219.242	PTR	host242-219-21-89.convergenze.it
89.21.221.10	PTR	host10-221-21-89.convergenze.it
89.21.221.50	PTR	host50-221-21-89.convergenze.it
89.21.221.56	PTR	host56-221-21-89.convergenze.it
89.21.221.115	PTR	host115-221-21-89.convergenze.it
89.21.221.160	PTR	host160-221-21-89.convergenze.it
89.21.221.187	PTR	host187-221-21-89.convergenze.it
89.21.222.18	PTR	host18-222-21-89.convergenze.it