Robtex

Up: 194.244.5.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 194.244.5.0/26
Down right: 194.244.5.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
194.244.5.28	PTR	dhmail.datahouse.it
194.244.5.39	PTR	case.it
194.244.5.39	PTR	ecasa.it
194.244.5.39	PTR	ecasapro.it
194.244.5.42	PTR	mail.datahouse.it
194.244.5.42	PTR	merc-dns.datahouse.it
194.244.5.42	PTR	merc-servizi.datahouse.it
194.244.5.53	PTR	relay1.datahouse.it
194.244.5.81	A	mail.pambianco.com
194.244.5.93	A	mail.camiceriagiemme.com
194.244.5.93	A	mail.giemmebrandscorporate.com
194.244.5.93	A	mail.caliban.it
194.244.5.98	A	codexv.it
194.244.5.98	A	hotelganimede.it
194.244.5.98	A	isoladiventotene.it
194.244.5.100	PTR	mail.justagency.it
194.244.5.100	PTR	mail.webfree.it