Robtex

Up: 199.36.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.36.152.0/23
Down right: 199.36.154.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.36.152.1	PTR	domain.not.configured
199.36.152.1	A	of-in-f1.1e100.net
199.36.152.1	A	ol-in-f1.1e100.net
199.36.153.7	PTR	domain.not.configured
199.36.153.8	PTR	domain.not.configured
199.36.153.10	PTR	domain.not.configured
199.36.153.185	PTR	domain.not.configured