themroc on Nostr: npub190rjk…ek7nv I thought an instance was connected to all the other other ...

npub190rjk0vejkz8uq4fpvfvxfrv8h5ec8hh3h4a740zsdj090fs9jvsrek7nv (npub190r…k7nv)
I thought an instance was connected to all the other other instances by default and that it started filtering from there.
How can I know what relays my instance uses?