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Reserved Names (Blocked Names)

Domains a registry withholds from open registration, such as premium, policy, or protected labels.

FBFenwei BianAuthorVZVictor ZhouEditorJune 22, 2026
  • glossary

Reserved names are labels a registry holds back from open registration. The reasons vary: some are premium names set aside to sell at a higher price, some are blocked for policy or legal reasons (geographic terms, registrar names, ICANN-mandated strings), and some sit on a collision-avoidance list to prevent clashes with internal network names. The reserved list is specific to each TLD and set by its operator under ICANN rules, which is why a name can be available in one TLD but unregisterable in another. Reservation happens entirely at the registry layer of the traditional system, before a name ever becomes a registrant's — and so before it could be tokenized.

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Contributors

Fenwei Bian

Software Developer & Writer • Namefi
Author

Fenwei Bian is a software developer in her thirties who spends her working hours in pull requests and her weekends with her hands in soil or sawdust. Years of open source on GitHub taught her that names are interfaces: a good one is clear, honest about what it does, and kind to whoever has to use it next.

She gardens because it rewards patience and punishes wishful thinking, and she does woodwork because a joint either fits or it doesn't. Both habits show up in how she writes about naming — measure twice, check the source, and don't sand over a rough spot and hope no one notices.

For Namefi she writes about how domain markets actually move, the practical trade-offs of tokenizing and flipping names, and picking a domain you'll still be glad you own in twenty years.

GitHub

Victor Zhou

Founder & Standards Editor • Namefi
Editor

Victor Zhou is a technology founder and standards editor focused on digital identity and trust. He founded Namefi, edits Ethereum Improvement Proposals, and previously led smart-contract architecture work at Google Labs.

His work sits at the intersection of naming, ownership, and the systems people use to establish identity online. That perspective makes him especially interested in the way names move between personal meaning, public recognition, and digital infrastructure.

For Namefi, Victor edits and writes about domains as durable digital identity: how names become ownable onchain assets, how tokenization changes custody and trust, and what naming can learn from the systems people use to establish identity online.

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