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Most likely the domains like tmp.dev, staging.dev, and production.dev are premium domains that will never be released by the registry. Many premium domains are
by bhartzer 8y ago
Most likely the domains like tmp.dev, staging.dev, and production.dev are premium domains that will never be released by the registry.
Many premium domains are held back by the registry, which are a part of icann rules. Those domains are typically not able to be registered and used by anyone.