Robtex

Up: 216.52.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.52.12.0/23
Down right: 216.52.14.0/23

IP	Type	Hostname
216.52.12.10	PTR	webmail.msli.com
216.52.12.11	A	msli.com
216.52.12.11	A	www.msli.com
216.52.12.15	A+PTR	smtp.msli.com
216.52.12.16	A+PTR	smtp1.msli.com
216.52.12.17	A	bdc03.msli.com
216.52.12.51	A+PTR	outmail2.msli.com
216.52.12.100	A	www.meyersound.com
216.52.12.100	A	meyersound.com.au
216.52.13.59	PTR	ns04.hotwire.com
216.52.14.226	PTR	mail.demandtec.com
216.52.14.232	PTR	mailg.demandtec.com
216.52.15.10	A+PTR	email.symyx.com
216.52.15.17	A+PTR	email1.symyx.com