Hello Diego,
I sent a ping to the three IPs you listed, plus the one in the screenshot you provided (172.217.29.51), and received successful responses (see attached).
I can see that you already created a ticket in the
Issue Tracker to further investigate this. The Issue Tracker is indeed a better place to drive this to a resolution as its purpose is to make us aware of issues in our products, and as such we’ll follow up this discussion from there.