: How can I verify if a Top Level Domain is in the root DNS servers used by ICANN? I may not have the right company in my question. But how do I know if a TLD is "sanctioned" by ICANN?

@XinRu657

There is one single official list, it is here: www.iana.org/domains/root/db

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@Jessie594

In order for a top level domain to be detected anywhere it needs to have been established and approved by ICANN with an appropriate registry (such as VeriSign for .com and .net TLD's).

Using your specific examples a quick check of .academy finds that it is a valid and accredited TLD managed by Donuts and .pro is approved and accredited and hosted by Registry Services Corporation.

Examples of a psuedo TLD that don't work without something special being done is the .onion TLD which only works if you have TOR installed on a computer. Basically if you can connect to the TLD from your computer and you haven't done anything special to your DNS server to make it work then it should work for any clients, and for a registrar to sell a domain name on a TLD the TLD needs to exist and be accredited.

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