Get closest page ID from URL

Question

Lets say on my WordPress website I navigate to:

www.example.com/media-centre/news/17/an-example-news-post

In this case I am looking at a post in a CPT called News.

What I want to do is get the page ID thats closest to that URL. I know the closest page ID can be found at:

www.example.com/media-centre/news/

So how do I loop back over my URL to find the closest page and then how do I get the ID of that page?