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In practice, ICANN DNS caters to guessable DNS names. Theoretically does anything stop anyone from providing globally visible "unguessable" DNS names, e.g., DN

• naasking 7y ago
  You could, and a server-side restriction to only respond to that host name would qualify as an unguessable designator, but it's kind of backwards. The unguessable tokens are supposed to be cheap and ubiquitous, where DNS names typically aren't.
  • 3xblah 7y ago
    "The unguessable tokens are supposed to be cheap and ubiquitous, where DNS names typically aren't." Just to clarify, you are referring to the commercialisation of domain names, the DNS run by ICANN, not an inherent property of DNS per se. I run authoritative nameservers at home, including a custom root.zone. I create names whenever I neeed them, so I still think of domain names as "free", in theory. Only ICANN domain names carry a fee. (In the very beginning they were free.)