Robtex

Up: 45.58.74.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 45.58.74.128/26
Down right: 45.58.74.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
45.58.74.129	A	dl-client86.dropbox.com
45.58.74.129	A	dl-client94.dropbox.com
45.58.74.129	A	dl-client123.dropbox.com
45.58.74.132	A	api-content0.dropbox.com
45.58.74.132	A	api-content1.dropbox.com
45.58.74.161	A	dl-client86.dropbox.com
45.58.74.161	A	dl-client123.dropbox.com
45.58.74.161	A	dl-client23.dropbox.com
45.58.74.164	A	block-api.dropbox-dns.com