Pink PostWhat domain age tells you
Domain age is the time since the domain was registered. On its own it is not a Google ranking factor; Google's John Mueller has said so publicly. But it is a useful signal when you vet sites: a "high authority" guest post site registered six months ago deserves a closer look.
How outreach teams use it
- Vetting prospects: compare age with the site's claimed history and traffic. A very new domain with big metrics can be an expired domain rebuilt to sell links.
- Checking your own sending domain: very young domains have little sender reputation. Warm new outreach domains up slowly for several weeks.
- Expiring domains: an expiry date that has passed or is days away can mean the site is about to go dark, along with your link.
RDAP vs WHOIS
RDAP (Registration Data Access Protocol) is the standard ICANN now requires registries and registrars to support in place of WHOIS. It returns structured data over HTTPS. Since GDPR, personal registrant details are mostly redacted, but registration and expiry dates are still published for generic domains like .com, .org and .net. Some country-code registries do not publish them; the tool says so when that happens.
Registration date vs first use
The date shown is when the current registration began. If a domain expired and was re-registered, the clock restarts, so a site can be older than its domain age suggests, or a new site can sit on an old name. The Internet Archive's Wayback Machine shows what was on the domain over time.