Two naming worlds that rarely talk to each other
The internet now has two parallel systems for naming things. The traditional one — the domains you already know, ending in .com, .org, and hundreds of other suffixes — is coordinated by ICANN and resolved through DNS. The newer one lives on public blockchains: names like nike.eth or brand.sol that resolve to crypto wallets and decentralised apps. Traditional WHOIS tools ignore the blockchain names entirely, and crypto-native tools ignore ICANN domains. This page bridges the gap.
The practical reason to care is brand protection. A company that owns nike.com and has trademarked its name has a clear interest in knowing whether someone has registered nike.eth — because that Web3 name can be pointed at a wallet, used to receive payments, or attached to a decentralised profile, potentially trading on the brand's reputation. The same squatting dynamics that played out with domain names in the 1990s are replaying in the Web3 naming space, and rights holders increasingly need to watch both.
ENS — Ethereum Name Service (.eth)
ENS is the largest and most established Web3 naming system. It maps human-readable names ending in .eth to Ethereum addresses and other resources, replacing the need to share a long hexadecimal wallet address with a simple name. An ENS name is itself an NFT — it is owned by a wallet, can be bought and sold, and expires unless renewed, much like a traditional domain registration.
Because ENS records live on the Ethereum blockchain, they are fully public and deterministic: anyone can query whether a given .eth name is registered and which address holds it, with no gatekeeper and no redaction. That transparency is the opposite of post-GDPR WHOIS, where registrant details are hidden — on ENS, the holding address is openly visible, though the human behind that address may still be pseudonymous. When this tool reports a .eth name as registered, it shows the holding address so you can investigate further on a block explorer.
SNS — Solana Name Service (.sol)
SNS is the equivalent naming system on the Solana blockchain, producing names ending in .sol. It serves the same purpose as ENS — turning a wallet address into a readable name — within the Solana ecosystem, and it has become the de facto standard for Solana-based identity. Like ENS, registration status and ownership are public and queryable on-chain.
Checking both .eth and .sol matters because a brand's exposure isn't limited to one chain. A squatter might register a name on whichever ecosystem is most active or valuable at the time, so a complete picture requires looking across chains — which is exactly what this cross-reference does in a single step.
Beyond ENS and SNS: the wider Web3 naming landscape
ENS and SNS are the two largest single-chain naming systems, but a complete brand-protection sweep looks wider. This tool also checks three more:
Unstoppable Domains is unusual because it spans many suffixes at once — .crypto, .x, .nft, .wallet, .bitcoin, .dao, and more. A single keyword can be registered across several of these, so the tool checks the common ones and reports where the name is taken. Because Unstoppable names are bought once and don't expire like ENS, they are a popular target for defensive and speculative registration alike.
Base names (.base.eth) belong to Base, the Ethereum layer-2 network backed by Coinbase. Base naming grew rapidly on the back of Coinbase's large user base, making it one of the faster-moving corners of Web3 identity — and therefore worth watching for brand exposure even though it is newer than ENS itself.
Farcaster is a decentralised social network where usernames (fnames, shown as @name) are on-chain identities rather than domains in the traditional sense. But for a brand, a Farcaster handle matters the same way a social-media handle does: it is a public identity someone can claim and post under. Checking it rounds out the picture of where a brand name might already be taken across the decentralised web.
This is a keyword match. When you enter nike.com, the tool takes the core name — nike — and checks whether nike.eth and nike.sol are registered. That answers a genuinely useful question: is the matching Web3 name taken, and if so, by which address?
It is important to be precise about what this does not establish. A registered nike.eth is not proof that Nike owns it — in fact, for a valuable brand name, a registered Web3 equivalent held by an unknown wallet is often the opposite: a sign of possible squatting. And because modern WHOIS redacts the registrant of the traditional domain, there is no reliable way to confirm that the same person or company controls both the domain and the blockchain name. The two identity systems share no common key. So this tool tells you whether a same-named Web3 asset exists and who holds it on-chain — a strong lead for a brand-protection or research workflow — but it does not, and cannot honestly, assert shared ownership between a redacted domain and a wallet. Treat a match as a signal to investigate, not a conclusion.
How to use a match
If you are protecting a brand and find the matching .eth or .sol registered to an address you don't recognise, the holding address shown here is your starting point: you can view its other holdings and activity on a public block explorer, and, if the name infringes a trademark, pursue it through the dispute mechanisms that the respective naming services and the wider legal system provide. If the name is available, that itself is useful intelligence — a rights holder may choose to register it defensively before someone else does, exactly as brands routinely register defensive domain variations.