Robtex

Up: 213.137.8.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 213.137.8.0/24
Down right: 213.137.9.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.137.8.5	A	mail.vathek.com
213.137.8.7	PTR	host213.137.8.7.manx.net
213.137.8.8	PTR	host213.137.8.8.manx.net
213.137.8.10	PTR	mail.boston.co.im
213.137.8.24	A+PTR	gw.wilsonbet.com
213.137.8.38	A	mail.richmondsquaregroup.com
213.137.8.60	A+PTR	mail.tabs.im
213.137.8.61	PTR	host213.137.8.61.manx.net
213.137.8.76	PTR	host213.137.8.76.manx.net
213.137.8.78	PTR	host213.137.8.78.manx.net
213.137.8.86	PTR	host213.137.8.86.manx.net
213.137.8.117	PTR	host213.137.8.117.manx.net
213.137.8.133	A	mail.niralaiom.com
213.137.8.138	A	mail.insafehands.im
213.137.8.163	A	mx.crane.im
213.137.8.170	A	mailserver.discountequestriansupplies.com
213.137.8.173	PTR	host213.137.8.173.manx.net
213.137.8.173	A	mail.imperiumltd.com
213.137.8.173	A	mail.murrayton.com
213.137.8.191	A+PTR	mail.cdl.co.im
213.137.8.200	A	iom.ksihawk.com
213.137.8.209	A+PTR	mail.klt.im
213.137.8.214	PTR	host213.137.8.214.manx.net
213.137.8.214	A	vdsl.lornehouse.com
213.137.8.214	A	mail.lornehouse.com
213.137.8.222	A+PTR	mail.macs.co.im
213.137.8.223	PTR	boal.co.uk
213.137.8.223	A	mail.lifebase.co.uk
213.137.8.223	A	mail.trinity.im
213.137.8.232	PTR	host213.137.8.232.manx.net
213.137.8.232	A	majestic.apslgroup.com
213.137.8.232	A	iom02.apslgroup.com
213.137.8.246	PTR	host213.137.8.246.manx.net
213.137.8.246	A	mail.manxbirdlife.im
213.137.9.13	PTR	host213.137.9.13.manx.net
213.137.9.13	A	mx1.carltonhomes.im
213.137.9.21	A	gamesco.com
213.137.9.35	PTR	host213.137.9.35.manx.net
213.137.9.73	PTR	mail.merako.co
213.137.9.73	A+PTR	mail.cleator.im
213.137.9.73	A+PTR	mail.myemail.im
213.137.9.77	PTR	host213.137.9.77.manx.net
213.137.9.138	A+PTR	mail.mbws.org.im
213.137.9.148	PTR	host213.137.9.148.manx.net
213.137.9.148	A	mail.thompsons-cas.com
213.137.9.236	PTR	host213.137.9.236.manx.net