Robtex

Up: 46.20.86.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 46.20.87.0/25
Down right: 46.20.87.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
46.20.87.18	A+PTR	smtp.elettrotecnicabc.com
46.20.87.22	PTR	dsl-46.20.87.22.fibering.com
46.20.87.22	A	smtp2.elettrotecnicabc.com
46.20.87.26	PTR	corus.pubblicentro.com
46.20.87.26	A	mail.pubblicentro.com
46.20.87.26	A	fibering.pubblicentro.com
46.20.87.43	A	email1.eurolegnogroup.it
46.20.87.99	A+PTR	ip78.vibac.it
46.20.87.99	A	ip42.vibac.it
46.20.87.101	A+PTR	ip86.vibac.it
46.20.87.102	A+PTR	ip87.vibac.it
46.20.87.134	A	servmail.syrom.it
46.20.87.142	PTR	dsl-46.20.87.142.fibering.com
46.20.87.142	A	mx1.jusjuris.eu
46.20.87.172	A+PTR	ip68baz.vibac.it