Robtex

Up: 140.99.50.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 140.99.50.0/25
Down right: 140.99.50.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
140.99.50.2	A	etfsmarketing.com
140.99.50.2	A	mail1.etfsmarketing.com
140.99.50.42	PTR	curealty.deru.com
140.99.50.48	PTR	network.inxsol.deru.com
140.99.50.54	PTR	54.inxsol.deru.com
140.99.50.90	PTR	90-rmastrapasqua.deru.com
140.99.50.122	A	dd.lufthans.com
140.99.50.129	PTR	scottsdale.deru.net
140.99.50.154	A	mail.lawdepartmentdesktop.com
140.99.50.162	PTR	cmdctrl.com
140.99.50.226	PTR	nigel.sindel.com
140.99.50.226	A	nigel.airmarketing.com
140.99.50.226	A	nigel.rosieonthehouse.com
140.99.50.227	PTR	227.sindel.com
140.99.50.237	PTR	237.sindel.com