Robtex

Up: 31.193.18.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.193.18.0/25
Down right: 31.193.18.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.193.18.8	A+PTR	mail.fincos.it
31.193.18.8	A	mail.vimet.com
31.193.18.31	A	mail.tecnid.it
31.193.18.52	PTR	52-18-193-31.xdsl.timenet.it
31.193.18.52	A	mail.grupponari.it
31.193.18.82	PTR	82-18-193-31.xdsl.timenet.it
31.193.18.82	A	mx1.faviassicura.it
31.193.18.82	A	mx1.assiplus.net
31.193.18.160	A+PTR	s-suite.studiobonafede.com
31.193.18.160	A	mail.studiobonafede.com
31.193.18.160	A	studiobonafede.com
31.193.18.196	A	mail.studionweb.it
31.193.18.202	A	posta.fronesis.it
31.193.18.238	A	mail.viganolegnami.it
31.193.18.238	A	remote.viganolegnami.it
31.193.18.250	PTR	mail.geasistemi.it
31.193.18.250	A	geasistemi.it