Domain Age Distribution Among the World's Most-Visited Websites: A 2026 RDAP-Based Snapshot

An RDAP-based measurement of domain registration ages across the top 1,000 domains in the Tranco list (the standard research-community replacement for the discontinued Alexa top-sites ranking). Of 1,000 domains queried via the ICANN RDAP bootstrap service (rdap.org), 499 (49.9%) returned a usable registration date. Among resolved domains, the mean age was 20.33 years and the median was 21.25 years; 36.7% were 25+ years old and only 6.0% were under 5 years old. The dataset (CSV) and full methodology/limitations writeup (Markdown) are included. Published by Domain Age Finder (domainagefinder.com), a free tool for checking any domain's registration age and history.