View URL in app banner before proceeding?

Hi guys,

Hope this is the right section.

My brother gave me his old iPhone and so I'm still getting used to it.

Is there a way to view the URL of a banner ad in an app? or a way to see which ad network is displaying the banner?

I tried tap & hold on the banner and one time it worked (and showed a bubble with the url) but other times it does nothing and when I release it loads the url.

If there's an app that shows this information, that would be great too.

Any ideas?