Background
Domain age is the time between a domain's first registration and today. It's often used as a proxy for trust: an aged domain with a clean history typically has more accumulated backlinks, more brand mentions, and more time to earn editorial links than a newly-registered one. That said, age alone doesn't rank a site. Google has confirmed it's a weak signal at best, and a 20-year-old site with no links won't outrank a 6-month-old site with 500 quality links.
We pull registration data live from RDAP (the modern replacement for WHOIS) and cache it for 30 days. Where available, we also include the registrar and the domain's Tranco popularity rank, refreshed weekly from the Tranco research list.