Robtex

Up: 193.51.56.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 193.51.56.0/25
Down right: 193.51.56.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.51.56.4	A+PTR	xdns1.iter.org
193.51.56.5	A+PTR	smtp1.iter.org
193.51.56.6	A+PTR	smtp2.iter.org
193.51.56.7	PTR	spam1.iter.org
193.51.56.7	A	smtp1.iter.org
193.51.56.8	A+PTR	spam2.iter.org
193.51.56.17	PTR	ppuser.iter.org
193.51.56.17	PTR	star.iter.org
193.51.56.17	A	webmail.iter.org
193.51.56.19	A	iter.org
193.51.56.19	A	www.iter.org
193.51.56.20	A+PTR	av.iter.org
193.51.56.40	A+PTR	io-ws-xdns1.iter.org
193.51.56.41	A+PTR	io-ws-xdns2.iter.org
193.51.56.44	A+PTR	ftpold.iter.org
193.51.56.45	A	ftp.iter.org
193.51.56.49	PTR	star.iter.org
193.51.56.49	A	portal.iter.org
193.51.56.49	A	icu.iter.org
193.51.56.58	A	imap.iter.org
193.51.56.70	A+PTR	svnpub.iter.org
193.51.56.116	A	av.iter.org
193.51.56.117	A	av.iter.org