Robtex

Up: 89.21.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 89.21.200.0/22
Down right: 89.21.204.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.21.200.8	PTR	host8-200-21-89.convergenze.it
89.21.200.8	A	vearicambi.com
89.21.200.50	A	mail.seciedilizia.com
89.21.200.88	PTR	host88-200-21-89.convergenze.it
89.21.200.116	PTR	host116-200-21-89.convergenze.it
89.21.200.116	A	mx2.diocesivallodellalucania.it
89.21.200.116	A	mx1.diocesivallodellalucania.it
89.21.200.226	A	exchange.arabafenicespa.com
89.21.201.3	A	enzoviola.it
89.21.201.3	A	mx1.wifreesrl.it
89.21.201.3	A	mx2.wifreehotspot.com
89.21.204.28	A	cilentoeat.com
89.21.204.29	A	www.bccaquara.it
89.21.204.29	A	bccaquara.it
89.21.204.45	A	convergenze.it
89.21.204.46	A	aristeaspa.eu
89.21.204.46	A	sicert.net
89.21.204.46	A	aristeaspa.com
89.21.204.57	A	imap.convergenze.it
89.21.204.67	PTR	host67-204-21-89.convergenze.it
89.21.204.69	A	www.stiletv.it
89.21.204.83	A	www.marcheholiday.it
89.21.204.83	A	marcheholiday.it
89.21.204.86	A	cloliday.com
89.21.204.94	A	wireless-experience.com
89.21.204.184	PTR	host184-204-21-89.convergenze.it
89.21.204.226	PTR	host226-204-21-89.convergenze.it
89.21.204.233	PTR	host233-204-21-89.convergenze.it
89.21.204.250	PTR	host250-204-21-89.convergenze.it
89.21.205.57	PTR	host57-205-21-89.convergenze.it
89.21.205.120	PTR	host120-205-21-89.convergenze.it
89.21.205.123	PTR	host123-205-21-89.convergenze.it
89.21.205.176	PTR	host176-205-21-89.convergenze.it
89.21.206.10	PTR	host10-206-21-89.convergenze.it
89.21.206.19	PTR	host19-206-21-89.convergenze.it
89.21.206.136	PTR	host136-206-21-89.convergenze.it
89.21.206.137	PTR	host137-206-21-89.convergenze.it
89.21.206.169	PTR	host169-206-21-89.convergenze.it
89.21.206.171	PTR	host171-206-21-89.convergenze.it
89.21.206.243	PTR	host243-206-21-89.convergenze.it
89.21.207.1	PTR	host1-207-21-89.convergenze.it