https://en.wikipedia.org/wiki/Kremen_v._Cohen
but it's tricky because the domain name registries and registrars have a kind of thicket of contracts nowadays that subordinates registrants' property interests to other rules and considerations. So I don't think a court would think that a modern-day domain name registrant has property rights in a domain name that supersede all of those contractual terms.
Edit: my recollection is that Kremen v. Cohen interpreted the legal defaults that applied because Kremen registered the domain name in an era when Network Solutions didn't require registrants to agree to a contract that limited Network Solutions's liability and gave it various explicit rights and powers.
I'm not a huge ICANN expert, but I think ICANN broadly thinks the status quo is preferable to one in which registrants had stronger, less equivocal property interests in names.
The question before the Court was not whether a domain name is a form of property. Both parties agreed that a domain name are a form of property; that wasn't in dispute. The Court did affirm their position in black letter law, though.
Rather, the question before the Court was whether, as intangible property, a tort of conversion claim could be made against it under California law. Previously, cases disagreed as to whether it could be recognized. The Court found that it could be.