1.1.1.1 is not reachable from the Fastweb S.p.A network

Hi,

The DNS service was working until a few days ago.
Suddenly my browser stopped resolving domains and I was surprised to find out that the Cloudflare DNS was unreachable via tracert.

I then switched to 1.0.0.1 which is still working.

I tried to contact the ISP but they haven’t replied yet and I am not sure if they will.
Any confirmation as to why 1.1.1.1 is unreachable would be appreciated.

This is definitely related to something local, based on the trace route. It could be a configuration issue on your first router, or your ISP.