Can you open http://cb.w3.changeip.name/go/5s from mainland China?
No.
No recent testsVerdict from 2025-11-05 · 10 mo ago
As of the last test on 2025-11-05 — 10 mo ago — it was blocked in mainland China. We haven't tested it since, so this may have changed.
Access cb.w3.changeip.name with GreatFireVPN →Frequently asked questions
Is http://cb.w3.changeip.name/go/5s blocked in mainland China right now?
We haven't tested http://cb.w3.changeip.name/go/5s in the last 90 days. As of the last test on 2025-11-05 (10 mo ago), it was blocked in mainland China. Use the Test now button on this page for a fresh measurement.
Why is http://cb.w3.changeip.name/go/5s blocked in mainland China?
As of the last test on 2025-11-05 — 10 mo ago — it was blocked in mainland China. We haven't tested it since, so this may have changed.
Since when has http://cb.w3.changeip.name/go/5s been blocked?
GreatFire has recorded interference with http://cb.w3.changeip.name/go/5s from mainland China since 2016-11-21.
How can I access http://cb.w3.changeip.name/go/5s from mainland China?
You need a circumvention tool such as a VPN. GreatFireVPN, built by GreatFire, is designed to bypass the Great Firewall and reach sites like cb.w3.changeip.name.
http://cb.w3.changeip.name/go/5s · JSON