Free WHOIS lookup
Look up WHOIS details for any domain
Enter a domain to see its registrar, when it was registered, when it expires, its status codes and nameservers. Enter an IP address to see the network that owns it and its abuse contact.
Try: example.com · github.com · 8.8.8.8
How it works
Understanding WHOIS & RDAP
WHOIS records show who is responsible for a domain name or an IP address block. They are the first place to check when you want to know a domain's age, when it expires, which registrar manages it, or where to report abuse.
Domain records are kept by the registry of each top-level domain, such as Verisign for .com. IP address records are kept by the five Regional Internet Registries: ARIN, RIPE NCC, APNIC, AFRINIC and LACNIC. Generic TLD registries and the five RIRs publish their data over RDAP, which returns structured JSON instead of free-form text. Many country-code registries still run only the older WHOIS protocol.
FAQ
WHOIS lookup FAQ
Common questions about WHOIS data and domain registration.
Related guides
Learn more from the blog
Step-by-step guides on reading and using these results.
Where Is This Website Hosted? How to Find Out (5 Methods)
How to find where a website is hosted: a hosting checker, DNS, IP and ASN lookups, WHOIS/RDAP and response headers. Includes three worked examples with real output for a Cloudflare, a Vercel and a Hostinger site.
How to Monitor Website Hosting Changes With dig, cron and an API
Monitor website hosting changes with a short shell script: record a domain's DNS records, IP network and detected providers on a cron schedule, and get a diff when anything changes. Uses dig, curl and the Hosting Checker API.
What Is DNS and How Does It Work?
What is DNS and how does it work? A plain guide to the Domain Name System: how a lookup travels from your browser to the root, TLD and authoritative servers, plus caching, DNSSEC and encrypted DNS.
Related tools
More free tools
Explore our other free lookup and analysis tools.
Free lookup tool
Look up WHOIS details for any domain
Look up WHOIS data for any domain or IP. See the registrar, owner, registration and expiry dates, domain age, status codes, nameservers and abuse contact, fetched live from the registry.