Robtex

Up: 156.54.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 156.54.232.0/22
Down right: 156.54.236.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
156.54.232.21	A+PTR	mx05.telecomitalia.it
156.54.232.21	A	www.info412.it
156.54.232.22	A	mx06.telecomitalia.it
156.54.232.23	A	mx07.telecomitalia.it
156.54.232.24	A	mx08.telecomitalia.it
156.54.232.80	PTR	smtp.telecomitalia.it
156.54.232.81	PTR	smtp.telecomitalia.it
156.54.232.82	PTR	smtp.telecomitalia.it
156.54.232.99	PTR	smtptop.telecomitalia.it
156.54.232.99	A	*.netsiel.it
156.54.232.100	A+PTR	smtpout.telecomitalia.it
156.54.232.172	A	open.telecomitalia.it
156.54.232.182	A	www.info12.it
156.54.232.187	A	www.netsiel.it
156.54.232.187	A	www.fontedir.it
156.54.232.191	A	trieste.cww.telecomitalia.it
156.54.233.31	PTR	maile.telecomitalia.it
156.54.233.32	PTR	mailf.telecomitalia.it
156.54.233.34	PTR	mailb.telecomitalia.it
156.54.233.35	PTR	mailc.telecomitalia.it
156.54.233.141	A	mx05.telecomitalia.it
156.54.233.142	A	mx06.telecomitalia.it
156.54.233.143	A	mx07.telecomitalia.it
156.54.233.144	PTR	mx08.telecomitalia.it
156.54.233.160	PTR	mx1.telecomitalia.it
156.54.233.161	PTR	mx2.telecomitalia.it
156.54.233.162	PTR	mx3.telecomitalia.it
156.54.233.198	PTR	mx7.telecomitalia.it
156.54.233.200	A+PTR	grfedg701ba020.telecomitalia.it
156.54.233.201	A	grfedg702ba020.telecomitalia.it
156.54.234.56	A	www.hsgerardo.org
156.54.234.56	A	www.ats-pavia.it
156.54.234.56	A	asst-settelaghi.it
156.54.235.61	A	rekeepdigital.com
156.54.235.61	A	www.rekeepdigital.com
156.54.235.206	A	manutencooprivate.it
156.54.235.206	A	www.manutencoop.coop
156.54.235.236	A	ftp.manutencoop.it
156.54.238.7	A	webmail.bluarancio.com
156.54.238.8	PTR	webmail.ambilazio.com
156.54.238.8	PTR	webmail.bluarancio.com
156.54.238.8	A	sicurezzaalimentare.it
156.54.238.13	PTR	mx100.bluarancio.com
156.54.238.143	A	usta.it
156.54.238.148	A	mail.assonapa.it