WHOIS Lookup .io, .de, uk.com and 1,200+ more extensions
Check registration data for any domain: expiry dates, nameservers, registrar details and DNSSEC status. Including the extensions most lookup tools come back empty on.
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Enter a domain name to run a domain WHOIS search: registration details, expiry date, nameservers and registrar
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WHOIS Lookup for .io, .de, uk.com and 50 More Endings Most Tools Miss
The ordinary part first. This tool reads the global RDAP directory, so it looks up domains across more than 1,200 extensions, from .com and .co.uk to the newest gTLDs. That covers almost anything you'll type into it.
What it doesn't cover is the interesting bit. Two quite different sets of domain sit outside that directory, and most lookup tools treat both the same way: they report the name as unregistered. The domain isn't the problem. The lookup is.
We go and ask the registry that actually holds the record.
Private registries: 18 endings that aren't really extensions
Endings like uk.com and eu.com aren't top-level domains at all. Each is a single ordinary registration that a private registry, CentralNic, resells as though it were one, so yourbusiness.uk.com lives in their database rather than the .com registry. A standard lookup finds no directory entry for uk.com, falls back to plain .com, asks Verisign, and is told the name doesn't exist.
Tap any ending to drop it into the search box above, then type your name in front of it.
We register 6 of these ourselves: .uk.com, .uk.net, .gb.net and .eu.com at £27.99 a year, .us.com at £25.00, and .za.com at £171.99. All prices exclude VAT.
No RDAP entry at all: .io, .de and 33 more country extensions
RDAP is the modern, structured replacement for text WHOIS, and it comes with a public directory of which registry answers for which extension. Joining it is voluntary, and plenty of national registries never have. .io and .de are the two most people notice, but .co, .eu, .it, .se and .us are all missing too. A tool that only speaks RDAP has nowhere to send the query, which is why a .io WHOIS lookup elsewhere so often comes back with nothing at all.
These fall back to the registry's own WHOIS server on port 43, the older protocol RDAP was built to replace. Every one was checked against a live domain on 6 August 2026.
Where we still come up short
CentralNic run twenty of these endings. com.de and com.se are the other two, and they're missing above for a reason: that registry publishes no registration data for them whatsoever. Look up a com.de name anywhere and you'll get the small print and nothing else.
The same goes for a handful of national registries. .ch, .li, .es, .gr, .ph, .za, .jp, .gg and .je either publish nothing on the open protocols or hand back a page of terms and no record. A lookup on those will still come up empty here, and the availability check we offer instead is the honest answer rather than a workaround. No tool can show you what a registry won't release, and we'd rather say which ones than pad the list.
What Does the WHOIS Lookup Show?
This tool queries registration data via RDAP (Registration Data Access Protocol), the modern replacement for traditional WHOIS. You get the registrar, the creation, expiry and last-updated dates, nameservers, DNSSEC status and EPP status codes. Anything close to expiry is flagged so you don't miss a renewal.
RDAP returns structured data straight from the registry, which is why it comes first. Where a registry hasn't adopted it, and a good many national ones haven't, the tool drops to that registry's classic WHOIS server rather than reporting nothing. Each result says which of the two answered.
Who Is This Tool For?
Domain buyers checking registration and expiry dates before making an offer. Business owners verifying their own renewal status and nameserver configuration. Web developers confirming DNS changes after a provider migration. Anyone who needs to know who registered a domain, when it expires and where it points.
It's also for anyone who has already hit a wall somewhere else. Look up a .io, .de or uk.com domain on most tools and you'll be told the name doesn't exist, while the site sits there serving pages quite happily. If you've had that answer elsewhere, try it here.
Frequently Asked Questions
Because uk.com isn't a top-level domain. It's a single ordinary registration owned by a private registry, CentralNic, who resell it as though it were one. Your domain sits in their database rather than the .com registry, so a standard lookup follows the public directory, finds no entry for uk.com, falls back to plain .com and asks Verisign, who have never heard of your name. The answer comes back "not found" even though your domain is registered and working normally. Nothing is wrong with your domain. This tool queries the registry that actually holds the record, so it returns the real registration, expiry date, nameservers and registrar.
Eighteen: uk.com, uk.net, gb.net, eu.com, de.com, us.com, br.com, cn.com, ru.com, sa.com, za.com, za.bz, jpn.com, jp.net, mex.com, hu.net, se.net and ae.org. CentralNic operate twenty of these endings in total. The remaining two, com.de and com.se, are missing because that registry publishes no registration data for them at all, so no lookup tool anywhere can show you their details.
Because neither extension has an RDAP server listed in IANA's public directory. RDAP is the modern, structured replacement for text-based WHOIS, and joining its directory is voluntary. A good many national registries never have, including .io, .de, .co, .eu, .it, .se and .us. A tool built only on RDAP has nowhere to send the query, so it reports no data or claims the domain is not registered. This tool checks RDAP first and, where the extension is missing from the directory, falls back to that registry's own WHOIS server on port 43, which is the older protocol RDAP was designed to replace. Every result tells you which of the two answered.
This tool queries RDAP, the modern WHOIS replacement, and falls back to classic WHOIS where a registry has not adopted it. It shows registration data including registrant details (where not privacy-protected), registrar, creation date, and expiry date. If the owner has WHOIS privacy enabled, you'll still see the registrar name, which may offer a contact form for purchase enquiries.
Enter the domain here and check the expiry date. Bear in mind that most registrars auto-renew domains, and even after expiry there's typically a 30-90 day redemption period before the domain is released for public registration. The creation and last-updated dates also give useful context about how actively the domain is being managed.
Domain expiry scam emails are very common. They try to get you to "renew" with a different, more expensive registrar. Check the actual expiry date here, confirm your real registrar name, and only renew through your actual registrar. If the email is from a company you don't recognise, it's almost certainly a scam.
Enter your domain here and it shows the registrar name, their abuse contact details, and the nameservers currently assigned. This tells you exactly which company controls the domain so you can log in and manage it. Common with older domains that were set up by a previous web developer or business partner.
Look at the domain registration details. A recently created domain (days or weeks old) selling products at suspiciously low prices is a red flag. Check the creation date, registrar, and whether WHOIS privacy is hiding the owner. Legitimate businesses typically have domains registered for years and often show verifiable registrant details.
Enter your domain here and check what personal information is visible. The behaviour you should expect depends on the TLD. For .uk (.co.uk, .uk, .org.uk), Nominet's consent-based rules mean the public WHOIS does not display your name or address unless you have consented to disclosure; UK individuals are redacted by default. For international TLDs (.com, .net, .org and so on), if you have purchased a WHOIS privacy / proxy service from your registrar, your name, address, and contact details should be replaced with the proxy service's details. If your real information still shows on an international TLD, the privacy service may not be enabled or may have lapsed. Since GDPR, most registrars also redact personal details by default for domains with EU registrants regardless of any paid privacy add-on.
EPP status codes indicate the current state and transfer restrictions on a domain. "clientTransferProhibited" prevents unauthorised transfers. "clientDeleteProhibited" prevents accidental deletion. "ok" means the domain has no restrictions. Codes starting with "client" are set by your registrar; "server" codes are set by the registry. A healthy domain typically shows several "prohibited" statuses, which are protective locks.
Want to learn more about WHOIS data, domain expiry, and registration details? Read the full WHOIS Lookup guide.
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