Summarise the permitted or blocked domains on the dashboard according to the second-level domain that they come from - maybe also allow compiling the data according to linked domains.
For example all
- push.prod.netflix.com
-
api-global.netflix.com
are my top two domains, they would be listed as simply -
netflix.com (+)
or some other indication instead of "(+)" that it was a compilation of subdomains.
The additional suggestion is that
-
occ-0-1167-299.1.nflxso.net
and other such domains used by netflix could be folded in to that so one would get a list by "origin" of the domains rather than a breakout (initially) of all the separate subdomains.