Can you open https://connectivitycheck.android.com/generate_204 from mainland China?
Sometimes.
Access is unreliable — 100% of the last 1 conclusive tests showed interference.
The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
Frequently asked questions
Is https://connectivitycheck.android.com/generate_204 blocked in mainland China right now?
As of the last test on 2026-08-17, https://connectivitycheck.android.com/generate_204 is 100% disrupted in mainland China, based on GreatFire's live Great Firewall measurements.
Why is https://connectivitycheck.android.com/generate_204 blocked in mainland China?
Access is unreliable — 100% of the last 1 conclusive tests showed interference.
Since when has https://connectivitycheck.android.com/generate_204 been blocked?
GreatFire has recorded interference with https://connectivitycheck.android.com/generate_204 from mainland China since 2017-03-28.
How can I access https://connectivitycheck.android.com/generate_204 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 connectivitycheck.android.com.
https://connectivitycheck.android.com/generate_204 · JSON