WHOIS Lookup – Domain, IP & ASN Owner, Expiry Date
Free WHOIS lookup for any domain, IP address or ASN: registrar, creation and expiry dates, name servers, DNSSEC and status codes explained.
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- Instant results
- 100% free
- No sign-up
- Private
Type a domain, IP address or ASN in the box and press Look up. You’ll see who it’s registered with, when it was created, when it expires (with a countdown), its name servers, DNSSEC status and what each domain status code means.
More about WHOIS Lookup – Domain, IP & ASN Owner, Expiry DateHow to use, good to know & FAQ
What is a WHOIS lookup?
WHOIS is the public record of who registered a domain name or IP block. This tool uses RDAP, the modern replacement for WHOIS standardised by the IETF, which gives cleaner, more reliable data straight from the registries.
How to do a WHOIS lookup
- Type a domain (example.com), an IP (8.8.8.8) or an ASN (AS15169).
- Press Enter or click Look up.
- Read the summary, the status explanations, or open the raw data.
What you can find
- Domains: registrar, registration date, expiry date and days left, last update, name servers, DNSSEC, registrar abuse contact.
- IP addresses: network name, owning organisation, IP range and country.
- ASNs: the network operator behind an autonomous system number.
Good to know
- Owner names and emails are usually hidden for privacy (GDPR), so most lookups show the registrar instead.
- Some country domains don’t publish RDAP data. If that happens, use the registry’s own WHOIS page.
- Status codes like clientTransferProhibited are normal – they’re locks that protect the domain.
Frequently asked questions
How do I find out who owns a domain?
Run a WHOIS lookup. If the owner is hidden for privacy, contact the registrar shown in the results – most offer a contact form or abuse email.
How can I check when a domain expires?
Look at Expires on – the tool also shows how many days are left.
What does clientTransferProhibited mean?
The domain has a transfer lock, so it can’t be moved to another registrar until the owner unlocks it. It’s a security setting, not a problem.
Is WHOIS the same as RDAP?
RDAP is the newer version of WHOIS. It returns the same kind of information in a structured format and is now the official source for generic domains.
Can I look up an IP address owner?
Yes. Enter the IP and you’ll see the organisation and network it belongs to.
When to use it
Before buying a domain, when checking a suspicious website, finding the registrar to renew or transfer, or tracing which company runs an IP address.
Related: Need the domain’s DNS records too? Use the DNS Lookup.