Comment by iso1631

Global DNS servers are spread across the world. Most are operated by America but three are operated by Sweden, Japan and Netherlands.

The majority of people use their own ISP or an anycast address from a US company (cloudflare, google, opendns). Quad9 is European.

However any split in the root dns servers signals the end of an interconnected global network. Any ISP can advertise anycast addresses into its own network, so if the US were to be cut off from the world that wouldn't be an issue per-se, but the breakdown of the internet in the western world would be a massive economic shock.

It wouldn't surprise me if it happens in the next decade or two though.