If you have a domain under .io or .com you're relying on the root servers for that TLD to be run properly. For .io, for example, these appear to be the roots:

If you have a domain under .io or .com you're relying on the root servers for that TLD to be run properly. For .io, for example, these appear to be the roots: https://www.iana.org/domains/root/db/io.html https://www.iana.org/domains/root/db/io.html You also risk having bad things happen to your domain as a result of social engineering or other problems at the administrator and the risk of that may vary between TLDs since they're run by different companies.