How to check connections of content from third-party resources in the browser?

Question

css

how/is it possible to check if the content is connected from external resources? (sdn, pictures, fonts, banners). If you look through the network, it is not always clear.
Specifically, only chrome is interesting, but if possible, write about others please.

Answer 1

You can add the domain column, it is hidden by default
https://d.pr/free/i/xPCFbH

Answer 2

through the network is not always clear.

Why is it not always clear? Just look at the code (status) of the response.