Robtex

Up: 89.189.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 89.189.48.0/21
Down right: 89.189.56.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.189.52.156	PTR	host156-52-189-89.convergenze.it
89.189.52.255	PTR	host255-52-189-89.convergenze.it
89.189.54.64	PTR	host64-54-189-89.convergenze.it
89.189.54.66	PTR	host66-54-189-89.convergenze.it
89.189.54.114	PTR	host114-54-189-89.convergenze.it
89.189.54.179	PTR	host179-54-189-89.convergenze.it
89.189.54.211	PTR	host211-54-189-89.convergenze.it
89.189.55.114	A+PTR	mx.zoppelletto.com
89.189.55.214	A+PTR	mailsrv.pvosm.it
89.189.56.0	PTR	ip.89.189.56.0.telemar.it
89.189.56.130	A	webmail.romatomove.com
89.189.56.146	PTR	mail.brevetti-cea.com
89.189.56.218	A	mail.arkaintl.eu
89.189.56.218	A	mail.zerodefects.it
89.189.56.218	A	mail.arka.tech
89.189.57.22	A	mail.pba.it
89.189.57.130	PTR	ip.89.189.57.130.telemar.it
89.189.57.130	A	mail2.daniautomotive.it
89.189.57.130	A	mail2.gruppodani.com
89.189.58.2	PTR	ip.89.189.58.2.telemar.it
89.189.58.2	A	mx2.sigmasrl.biz
89.189.58.2	A	mx.sigmaproduzioni.it
89.189.58.16	PTR	ip.89.189.58.16.telemar.it
89.189.58.35	PTR	ip.89.189.58.35.telemar.it
89.189.58.78	A	mail.ricos.org
89.189.58.82	A+PTR	mail.euroalpha.it
89.189.58.82	A	euroalpha.hopto.org
89.189.58.82	A	mx.euroalphausa.com
89.189.58.96	PTR	ip.89.189.58.96.telemar.it
89.189.58.113	PTR	ip.89.189.58.113.telemar.it
89.189.58.161	PTR	ip.89.189.58.161.telemar.it
89.189.58.192	PTR	ip.89.189.58.192.telemar.it
89.189.58.227	A	mail.rossicaws.it
89.189.59.46	A	mail.worldmec.com
89.189.59.46	A	mail.dyamach.it
89.189.59.130	PTR	ip.89.189.59.130.telemar.it
89.189.59.130	A	mail.zogi.it
89.189.59.186	A	geinox.it
89.189.59.186	A	mail.geinox.it
89.189.59.186	A	mail.formulapizza.com
89.189.59.214	A	mail.formulapizza.com
89.189.59.214	A	enodia.com
89.189.59.250	A	mx1.3fchimicaamericas.com
89.189.59.250	A	mail.3fchimicaamericas.com
89.189.60.0	PTR	ip.89.189.60.0.telemar.it
89.189.60.221	PTR	ip.89.189.60.221.telemar.it
89.189.61.156	A	mail.pkolab.com
89.189.61.210	PTR	ip.89.189.61.210.telemar.it
89.189.61.210	A	nethservice2.geacon.it
89.189.62.32	A	mail.pivagomme.com
89.189.62.159	PTR	ip.89.189.62.159.telemar.it
89.189.63.255	PTR	ip.89.189.63.255.telemar.it