Robtex

Up: 178.239.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 178.239.40.0/22
Down right: 178.239.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
178.239.40.0	A+PTR	ip-178-239-40-0.in-addr.ntrnet.it
178.239.40.242	A+PTR	smtp.ferplast.com
178.239.40.242	A	ip-178-239-40-242.in-addr.ntrnet.it
178.239.40.243	A+PTR	smtp.ferpy.com
178.239.40.244	A	smtp.zoodom.com
178.239.40.253	A	ip-178-239-40-253.in-addr.ntrnet.it
178.239.41.130	A+PTR	ip-178-239-41-130.in-addr.ntrnet.it
178.239.41.147	A+PTR	ip-178-239-41-147.in-addr.ntrnet.it
178.239.41.147	A	dnswebcloud.com
178.239.41.196	A	mail1.edileuganea.it
178.239.42.170	PTR	ip-178-239-42-170.in-addr.as49289.com
178.239.42.234	PTR	ip-178-239-42-234.in-addr.as49289.com
178.239.43.34	A+PTR	ip-178-239-43-34.in-addr.ntrnet.it
178.239.43.49	PTR	ip-178-239-43-49.in-addr.ntrnet.it
178.239.43.62	A	ip-178-239-43-62.in-addr.ntrnet.it
178.239.43.73	A+PTR	ip-178-239-43-73.in-addr.ntrnet.it
178.239.43.82	A	ip-178-239-43-82.in-addr.ntrnet.it
178.239.43.138	A	ip-178-239-43-138.in-addr.ntrnet.it
178.239.43.208	PTR	ip-178-239-43-208.in-addr.ntrnet.it
178.239.43.226	A+PTR	ip-178-239-43-226.in-addr.ntrnet.it
178.239.43.226	A	mail.rezzadore.com
178.239.43.226	A	smtp.rezzadore.it
178.239.43.232	PTR	ip-178-239-43-232.in-addr.ntrnet.it
178.239.43.235	A+PTR	ip-178-239-43-235.in-addr.ntrnet.it
178.239.43.235	A	mail.foc.it
178.239.44.12	A	ip-178-239-44-12.in-addr.ntrnet.it
178.239.44.16	A	ip-178-239-44-16.in-addr.ntrnet.it
178.239.44.24	A+PTR	ip-178-239-44-24.in-addr.ntrnet.it