Whois lookup
Look up who owns a domain, how old it is and when its registration expires, along with the registrar and other whois registration details.
Unlock the full report
30-day free trial · cancel anytime
Loading plans…
Recommended
{{ plan.name }}
{{ money(priceMo(plan)) }}/mo
- {{ plan.maxTaskCount == null ? 'Unlimited' : plan.maxTaskCount }} monitored sites
- All check locations in the report
- TLS, headers & timing details
- Scheduled reports
- REST API access
Billed only after your trial · Compare all plans
What is a domain registration check
Check domain registration data including registrar, registrant contact details, and lease dates.
Find out moreHow does the domain owner lookup works
Get instant access to precise ICANN WHOIS data, presented in an easy-to-read format.
Find out moreWhois lookup domain features and advantages
See all domain data at a glance and set automated alerts before your registration expires.
Find out moreOnly need the expiration date? The domain expiry checker runs the same lookup and leads with the expiry date and the days left.
Don't rely on remembering the renewal date Set up domain and TLS monitoring
Key takeaways
- This tool looks a domain up over RDAP (Registration Data Access Protocol), the structured successor to whois, and returns the registrar, the registration and expiry dates, the nameservers and whatever contact data the registry publishes.
- Registries redact much of the contact data for privacy, so an empty owner field is normal rather than a sign of a problem.
- The lookup runs from HostTracker's own check network; a registry answer does not depend on where the query comes from.
- It is free, needs no login and no credit card.
- For continuous checks, see the SSL certificate and domain monitoring page, where domain expiry is rechecked every 6 hours and alerts before the registration lapses.
Part of HostTracker's website monitoring software.