WHOISDomain Tools
Look up registration, ownership, and lifecycle details for any domain.
What are domain tools?
Domain tools answer questions about the registration of a domain name: who it is registered through, when it was created, when it runs out, whether it is free, and how healthy its overall setup is. The domain tools on this page read the public registration data that registries publish through RDAP and WHOIS, and some combine it with DNS, website, SSL and email checks for a fuller picture.
They all work from current public data and are free to use without an account.
What each domain tool does
Registration records
WHOIS Lookup shows the public registration record for one domain: registrar, key dates, status codes and nameservers. It asks RDAP first and falls back to classic WHOIS for extensions that have no RDAP service.
RDAP Lookup shows the same registration through the structured RDAP protocol only, including which RDAP server answered and whether DNSSEC is reported.
Domain Information arranges the registration data into four tidy sections: registration, nameservers, status, and privacy and source.
TLD Lookup checks an extension such as .io or .de and tells you whether its registry offers RDAP, a WHOIS server, or neither.
Dates and availability
Domain Age Checker works out how long a name has been registered, in years, months and days.
Domain Expiry Checker shows the expiry date and the days remaining, with a clear active, expiring-soon or expired label.
Domain Availability Checker reports whether a name appears free to register, using six honest result types instead of a simple yes or no.
Bulk Domain Lookup checks up to 20 domains at once for availability, registrar and expiry, with a CSV download.
Combined checks
Domain Health Check scores nine weighted checks, from registration to SPF and DMARC, out of 100.
Domain Risk Check lists technical risk signals, such as a very new registration or missing email protection, and explains each one without accusing anyone.
Domain Comparison places two domains side by side and marks which settings are the same and which differ.
Complete Domain Report gathers twenty checks into one page, with recommendations for anything that failed.
How to choose between the domain tools
For one quick fact, use the single-purpose domain tools: age, expiry or availability. For the full registration record, start with WHOIS Lookup. When you need an overall judgement, the Domain Health Check gives a score, the Domain Risk Check gives warning signs, and the Complete Domain Report gives every detail. Use Bulk Domain Lookup for lists and Domain Comparison for two names.
Problems these tools help solve
- A website or mailbox stopped working because the domain expired.
- You need to know which registrar to contact about a domain.
- A name you want is taken and you want to know when it might lapse.
- An unfamiliar domain contacted you and you want context before trusting it.
- A client's portfolio needs a quick audit of renewal dates.
Reading domain tool results
Most of these tools show the same core fields, so it helps to know where they come from. Dates and status codes are published by the registry that runs the extension, while the registrar is the company the owner pays for the name. "Not available" means the registry did not publish that field, which is common for country-code domains and is not a sign that anything is wrong.
Related categories
Registration is only one layer. DNS Tools show where a domain points, SSL & Security checks its certificate, and Email Tools review the records that protect its mail.
Frequently asked questions
What is the difference between WHOIS and RDAP?
Both return a domain's public registration record. WHOIS is the older protocol and returns free text in a format that differs between registries. RDAP is its modern replacement and returns structured data with defined fields. Our WHOIS Lookup tries RDAP first and falls back to WHOIS when an extension has no RDAP service.
Why are the owner details hidden in most domain records?
Since data protection laws such as the GDPR, most registrars redact personal details by default, and many owners add privacy services. The registrar, dates, status codes and nameservers stay visible. To reach an owner, use the contact form or relay address that the registrar provides.
Can these domain tools tell me when a taken domain will become free?
They show the expiry date and status codes, which tell you when renewal is due and whether the domain is already in a grace or redemption period. They cannot predict whether the owner will renew. Many registrations renew automatically, so an approaching date is no guarantee.
How many domains can I check at once?
Bulk Domain Lookup accepts up to 20 unique domains per submission and lets you download the results as a CSV file. For larger lists, split them into batches. Every other domain tool on this page checks one domain at a time, apart from Domain Comparison, which takes two.
Which domain tool should I use for a full audit?
Use the Complete Domain Report when you want every detail in one place, or the Domain Health Check when you want a single weighted score. Both combine registration data with DNS, website, SSL and email checks, and both point you to the dedicated tool for anything that needs fixing.
Do the domain tools store the domains I check?
No account is needed and the tools only read public registration data. To keep the service fast and avoid repeated requests to registries, registration results are cached for up to an hour, and apparently available results for ten minutes, so a very recent change may take a short while to appear.
Why does a lookup sometimes fail for country-code domains?
Some country-code registries do not run an RDAP service or a public WHOIS server, and a few limit how much data they publish. The TLD Lookup tells you which methods an extension supports, which explains why results can be limited for that extension.