Good, I'm a bit new to the topic of nodes, and I have a doubt when obtaining the pairs connected to my node.

https://imgur.com/a/hj0bXQt

As you can see, when I get the list of connected peers, some of them have a not_publicly_routable network and as ip addresses 172.26.0.1 and 172.26.0.2, which are private networks.
How do those nodes connect to me (or me to them) without me knowing their ip address?