Robtex

Up: 185.8.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 185.8.148.0/23
Down right: 185.8.150.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.8.148.50	PTR	smtp1.maildeliver.it
185.8.148.51	PTR	smtp2.maildeliver.it
185.8.148.52	PTR	smtp3.maildeliver.it
185.8.148.53	PTR	smtp4.maildeliver.it
185.8.148.54	PTR	smtp5.maildeliver.it
185.8.148.83	A+PTR	mail.ittedi.it
185.8.148.107	A	hot123.it
185.8.148.109	PTR	mail.rtv38.com
185.8.148.114	A	mx-2.nautilo.it
185.8.148.114	A	mail.aquota.net
185.8.148.114	A	mx-2.razional.net
185.8.148.186	A+PTR	host1a.effeunoitaly.it
185.8.148.186	A	host.effeunoitaly.it
185.8.148.186	A	mail.effeunoitaly.it
185.8.148.195	A	mx-2.itla.it
185.8.148.195	A	mx-1.itla.it
185.8.149.13	A+PTR	host13-149-static-ros2.8-185.reteivo.com
185.8.149.82	A+PTR	host82-149-static-muz.8-185.reteivo.com
185.8.149.101	A+PTR	host101-149-static-muz.8-185.reteivo.com
185.8.149.179	A+PTR	host179-149-static-gav.8-185.reteivo.com
185.8.149.187	A	mx.comimp.it
185.8.150.4	A+PTR	host4-150-static-mta.8-185.reteivo.com
185.8.150.57	A+PTR	host57-150-static-fir1.8-185.reteivo.com
185.8.150.123	A+PTR	host123-150-static-ros.8-185.reteivo.com
185.8.150.143	A+PTR	host143-150-static-teg.8-185.reteivo.com
185.8.150.148	A+PTR	host148-150-static-teg.8-185.reteivo.com
185.8.150.167	A+PTR	host167-150-static-ser.8-185.reteivo.com
185.8.150.167	A	mail.cremonese.org
185.8.150.167	A	mail.ashweb.it
185.8.150.183	A+PTR	host183-150-static-ser.8-185.reteivo.com
185.8.151.13	A+PTR	host13-151-static-cast.8-185.reteivo.com
185.8.151.13	A	mail.paolomeacci.it
185.8.151.16	A+PTR	host16-151-static-cast.8-185.reteivo.com
185.8.151.52	A+PTR	host52-151-static-cast.8-185.reteivo.com
185.8.151.64	A+PTR	host64-151-static-cast.8-185.reteivo.com
185.8.151.138	A+PTR	host138-151-static-serp.8-185.reteivo.com
185.8.151.195	A+PTR	host195-151-static-smi.8-185.reteivo.com
185.8.151.207	A	mail.dolcezzesavini.com
185.8.151.219	PTR	host219-151-static-smi.8-185.reteivo.com
185.8.151.219	A+PTR	mail2.colorchimica.it
185.8.151.219	A	mail2.italservice-srl.com
185.8.151.255	A+PTR	host255-151-static-smi.8-185.reteivo.com