Robtex

Up: 198.72.6.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 198.72.6.0/25
Down right: 198.72.6.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.72.6.20	PTR	domain.not.configured
198.72.6.20	A	tmw.tmwdata.org
198.72.6.20	A	dc-fbdf48db5cd2.tmwdata.org
198.72.6.50	A	*.htmlns0.motherless.com
198.72.6.50	A	4ns10.dnsmadeeasy.commail.motherless.com
198.72.6.50	A	s5.motherless.com
198.72.6.51	A	*.htmlns0.motherless.com
198.72.6.51	A	4ns10.dnsmadeeasy.commail.motherless.com
198.72.6.51	A	s5.motherless.com