Can you open https://av91.co from mainland China?
Usually.
Usually reachable, but 6% of the last 32 tests were disrupted.
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://av91.co blocked in mainland China right now?
As of the last test on 2026-07-30, https://av91.co is 6% disrupted in mainland China, based on GreatFire's live Great Firewall measurements.
Why is https://av91.co blocked in mainland China?
Usually reachable, but 6% of the last 32 tests were disrupted.
Since when has https://av91.co been blocked?
GreatFire has recorded interference with https://av91.co from mainland China since 2025-03-30.
How can I access https://av91.co 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 av91.co.
https://av91.co · JSON