Robtex

Up: 5.104.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 5.104.28.0/25
Down right: 5.104.28.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.104.28.11	PTR	mx1.santandreatm.it
5.104.28.11	A	mail.santandreanovaraspa.com
5.104.28.66	A+PTR	luna.cc.atcall.it
5.104.28.67	A+PTR	ns2.cc.atcall.it
5.104.28.69	A+PTR	np.cc.atcall.it
5.104.28.70	A+PTR	shop.cc.atcall.it
5.104.28.101	A	eurogateway.it
5.104.28.101	A	www.eurogateway.it
5.104.28.103	A	imap.eurogateway.it
5.104.28.103	A	mail.eurogateway.it
5.104.28.103	A	pop3.eurogateway.it