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by MarsIronPI 166 days ago
IANA maintains a list of TLDs in the root zone[0]. I presume browsers use this list, since it does cover all TLDs in >99% of situations.

[0]: https://data.iana.org/TLD/tlds-alpha-by-domain.txt
1 comments
ranger_danger 166 days ago
Yes but local/corporate DNS servers can use any TLD they want...
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MarsIronPI 166 days ago
Right, but browsers don't automatically recognize those, as far as I know. If you want to visit a site with a custom TLD I believe you have to prefix it with the protocol.
link