This morning it looks like two of my connectivity providers had serious issues across almost all of Italy. I didn't notice anything and thought the problem was in other areas.
I was wrong: the problem was related to their DNS, which was down or malfunctioning.
This is why I didn't notice: I use my own DNS resolvers, and they perform resolutions directly, without a forwarder.
Once again and for the second time this week, Own Your Data and decentralization guaranteed continuity.
I will never stop saying it: Own Your Data!