docker.io
Mostly blocked
13 of the 14 URLs we have a verdict for under docker.io are blocked in mainland China; 1 are not. The site itself, https://docker.io, is blocked. The Great Firewall poisons its DNS, silently drops its packets so requests time out and resets the connection. 212 tests have been run under this domain since 2015-05-25, the most recent on 2026-07-16.
The site itself
http://docker.ioas of 2026Blockedhttps://docker.ioas of 2026Blockedhttps://www.docker.ioas of 2026IntermittentPages and subdomains (11)
http://auth.docker.ioas of 2026Blockedhttp://index.docker.ioas of 2026Blockedhttps://auth.docker.ioas of 2025Blockedhttps://docs.docker.ioas of 2026Blockedhttps://index.docker.ioBlockedhttps://status.docker.ioas of 2026Blockedhttp://registry.docker.ioBlockedhttp://registry-1.docker.ioBlockedhttps://registry-1.docker.ioas of 2026Blockedhttps://registry-1.docker.io/v2Blockedhttps://registry-1.docker.io/v2/BlockedAbout docker.io and the Great Firewall
13 of the 14 URLs we have a verdict for under docker.io are blocked in mainland China; 1 are not. The site itself, https://docker.io, is blocked. The Great Firewall poisons its DNS, silently drops its packets so requests time out and resets the connection. 212 tests have been run under this domain since 2015-05-25, the most recent on 2026-07-16.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks docker.io. GreatFire runs GreatFire VPN; the Analyzer also tests the domains of many VPN and proxy providers, so you can check whether one is reachable before relying on it.
Elsewhere on the site
docker.io is ranked #947 among the world's most-visited domains (Tranco).
Sites of similar popularity:character.aichaturbate.comrepubblica.itnationalgeographic.com
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.