Robtex

Up: 31.152.0.0/13
Can't show all results, try to descend to a more specific CIDR
Down left: 31.156.0.0/15
Down right: 31.158.0.0/15
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.156.17.134	A	lorenaantoniazzi.it
31.156.37.51	A+PTR	net-31-156-37-51.cust.vodafonedsl.it
31.156.37.51	A	athenasardegna.it
31.156.43.206	PTR	mail.corsport.it
31.156.43.226	A	mail.contieditore.it
31.156.49.146	A+PTR	mail1.clevermachines.com
31.156.49.219	PTR	mail.amcylinders.com
31.156.49.219	A	mailserver.amcylinders.com
31.156.58.106	PTR	net-31-156-58-106.cust.vodafonedsl.it
31.156.60.163	PTR	email.defendini.it
31.156.62.14	A+PTR	net-31-156-62-14.cust.vodafonedsl.it
31.156.62.14	A	mail.domesrl.it
31.156.62.67	A	posta.interflora.it
31.156.62.148	A	pop3.smartest.it
31.156.64.32	A+PTR	net-31-156-64-32.cust.vodafonedsl.it
31.156.64.32	A	merchinstock.com
31.156.80.104	A	kwvtwegv.com
31.156.80.104	A	eehsebvu.net
31.156.80.104	A	sbznbnuj.com
31.156.96.38	PTR	net-31-156-96-38.cust.vodafonedsl.it
31.156.121.167	A+PTR	net-31-156-121-167.cust.vodafonedsl.it
31.156.133.231	A+PTR	net-31-156-133-231.cust.vodafonedsl.it
31.156.133.231	A	fbsrl.serbox.it
31.156.154.201	A	mmissora.no-ip.org
31.156.155.23	PTR	net-31-156-155-23.cust.vodafonedsl.it
31.156.165.48	A	mvk.it
31.156.166.193	A+PTR	net-31-156-166-193.cust.vodafonedsl.it
31.156.166.193	A	fillobotto.com
31.156.171.101	A+PTR	net-31-156-171-101.cust.vodafonedsl.it
31.156.181.229	PTR	net-31-156-181-229.cust.vodafonedsl.it
31.156.182.155	A+PTR	net-31-156-182-155.cust.vodafonedsl.it
31.156.184.47	A+PTR	net-31-156-184-47.cust.vodafonedsl.it
31.156.190.164	A+PTR	net-31-156-190-164.cust.vodafonedsl.it
31.156.216.246	A+PTR	net-31-156-216-246.cust.vodafonedsl.it
31.156.238.124	PTR	net-31-156-238-124.cust.vodafonedsl.it
31.156.242.9	PTR	net-31-156-242-9.cust.vodafonedsl.it
31.156.246.150	A+PTR	net-31-156-246-150.cust.vodafonedsl.it
31.156.246.150	A	luxoritalia.zapto.org
31.156.251.114	A+PTR	net-31-156-251-114.cust.vodafonedsl.it
31.156.255.98	A+PTR	net-31-156-255-98.cust.vodafonedsl.it
31.157.58.45	PTR	mob-31-157-58-45.net.vodafone.it
31.157.60.200	A+PTR	mob-31-157-60-200.net.vodafone.it
31.158.64.141	PTR	mob-31-158-64-141.net.vodafone.it
31.159.11.189	A+PTR	mob-31-159-11-189.net.vodafone.it
31.159.34.89	A+PTR	mob-31-159-34-89.net.vodafone.it
31.159.127.253	A	dcpftmxl.com
31.159.128.195	A+PTR	mob-31-159-128-195.net.vodafone.it
31.159.235.210	A+PTR	mob-31-159-235-210.net.vodafone.it