Robtex

Up: 89.21.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 89.21.192.0/21
Down right: 89.21.200.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.21.192.12	A	r1.sn-jvo8xgbxo1x-o52e.googlevideo.com
89.21.192.71	A	host089021192071.static.milliway.it
89.21.192.91	A	mail.gubbioculturamultiservizi.it
89.21.192.91	A	mail.gubbiocm.it
89.21.194.34	A	mail2.euristica.com
89.21.194.35	A+PTR	host089021194035.static.milliway.it
89.21.194.35	A	lomail2.milliway.it
89.21.194.44	A	mail.majorfax.it
89.21.197.75	A	relay.pumpthemusic.com
89.21.198.20	PTR	host20-198-21-89.convergenze.it
89.21.198.192	PTR	host192-198-21-89.convergenze.it
89.21.199.59	PTR	host59-199-21-89.convergenze.it
89.21.199.103	PTR	host103-199-21-89.convergenze.it
89.21.199.103	A	radiopaestum.no-ip.biz
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
89.21.204.226	PTR	host226-204-21-89.convergenze.it
89.21.205.176	PTR	host176-205-21-89.convergenze.it
89.21.206.19	PTR	host19-206-21-89.convergenze.it
89.21.206.243	PTR	host243-206-21-89.convergenze.it
89.21.207.1	PTR	host1-207-21-89.convergenze.it