cannonballapp.io
All blocked
The one URL under cannonballapp.io we can reach a verdict on is blocked in mainland China. The Great Firewall silently drops its packets so requests time out. 31 tests have been run under this domain since 2015-12-04, the most recent on 2026-05-10.
The site itself
http://cannonballapp.ioas of 2026BlockedAbout cannonballapp.io and the Great Firewall
The one URL under cannonballapp.io we can reach a verdict on is blocked in mainland China. The Great Firewall silently drops its packets so requests time out. 31 tests have been run under this domain since 2015-12-04, the most recent on 2026-05-10.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks cannonballapp.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
Most-blocked .io domainsEvery tested URL under cannonballapp.io
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.