Robtex

Up: 45.58.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 45.58.68.0/23
Down right: 45.58.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
45.58.69.1	A	dl-client94.dropbox.com
45.58.69.1	A	dl-client17.dropbox.com
45.58.69.1	A	dl-client113.dropbox.com
45.58.69.33	A	dl-client8.dropbox.com
45.58.69.33	A	edge-block-client-fallback.dropbox-dns.com
45.58.69.38	A	block-misc.g1.dropbox.com
45.58.69.65	A	dl-client86.dropbox.com
45.58.69.65	A	dl-client123.dropbox.com
45.58.69.65	A	dl-client55.dropbox.com
45.58.69.69	A	gslb-dl.dropboxusercontent.com
45.58.69.97	A	dl-client94.dropbox.com
45.58.69.97	A	dl-client17.dropbox.com
45.58.69.97	A	dl-client113.dropbox.com
45.58.69.101	A	gslb-dl.dropboxusercontent.com
45.58.69.101	A	block-www-sjc.dropbox-dns.com
45.58.70.1	A	dl-client17.dropbox.com
45.58.70.1	A	dl-client113.dropbox.com
45.58.70.1	A	dl-client79.dropbox.com
45.58.70.4	A	api-content.dropbox.com
45.58.70.5	A	gslb-dl.dropboxusercontent.com
45.58.70.33	A	edge-block-client-fallback.dropbox-dns.com
45.58.70.33	A	dl-client23.dropbox.com
45.58.70.33	A	dl-client66.dropbox.com
45.58.70.37	A	block-www.g1.dropbox.com
45.58.71.46	A	iad4c-ra2-7c.sjc.dropbox.com
45.58.71.46	A	gw.pp.dropbox.com
45.58.71.106	A	iad4c-rc2-9c.sjc.dropbox.com