Overview
Introduction
Knowing exactly when a domain was first registered is useful for due diligence, security screening, and satisfying plain curiosity about a name you've bookmarked for years.
This tool asks the domain's own registry over RDAP, straight from your browser, and turns the registration timestamp it returns into a human-readable age.
What Is Domain Age Checker?
A domain lookup tool that reports a domain's original registration date and how many days, months, and years old it is.
It's part of this site's DNS & Domain Tools collection and queries a live RDAP server rather than a static database.
How Domain Age Checker Works
The domain is sent to rdap.org, which redirects to the correct registry's RDAP server based on the domain's TLD, and the response's 'registration' event is read for the date.
That date is compared against the current time to compute the domain's age in days, then formatted as years and days.
When To Use Domain Age Checker
Use it when vetting an unfamiliar site or email sender, since a domain registered days ago is a much weaker trust signal than one registered a decade ago.
It's also handy for settling 'how long have we owned this domain?' questions without digging through old invoices.
Often used alongside Domain Expiry Checker and Bulk WHOIS Lookup.
Features
Advantages
- Queries the authoritative registry directly rather than a cached third-party database.
- Works for the vast majority of gTLDs and most ccTLDs, which run standard RDAP servers.
Limitations
- A minority of legacy ccTLD registries don't run RDAP servers, so those domains will report as not found here.
- Registration date isn't the same as when a site actually started serving content; some domains sit unused for years after registration.
Examples
Best Practices & Notes
Best Practices
- Combine domain age with other signals (SSL certificate age, WHOIS privacy status, DNS history) rather than relying on age alone for trust decisions.
- Re-check age-sensitive decisions periodically; a domain's trust profile changes as it ages.
Developer Notes
Age is computed from the RDAP 'registration' event, not the more commonly cited (and less standardized) 'created' field some legacy WHOIS parsers use; RDAP's event array is the field the RFC actually defines.
Domain Age Checker Use Cases
- Screening an unfamiliar domain before entering payment or login information
- Verifying how long a company has owned its primary domain during due diligence
- Satisfying curiosity about how old a bookmarked or historically significant domain is
Common Mistakes
- Treating domain age as a definitive trust signal on its own; long-registered domains can still be compromised or repurposed.
- Assuming a 'not found' result means the domain is unregistered, when it may just mean the registry lacks an RDAP server.
Tips
- Pair this with the Domain Expiry Checker to see both ends of a domain's registration lifecycle at once.