Can you open 633.3-a.net from mainland China?
No.
It's blocked — 100% of the last 1 conclusive tests failed in mainland China.
Access 633.3-a.net with GreatFireVPN →2016first tested
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Frequently asked questions
Is 633.3-a.net blocked in mainland China right now?
As of the last test on 2026-07-22, 633.3-a.net is 100% blocked in mainland China, based on GreatFire's live Great Firewall measurements.
Why is 633.3-a.net blocked in mainland China?
It's blocked — 100% of the last 1 conclusive tests failed in mainland China.
Since when has 633.3-a.net been blocked?
GreatFire has recorded interference with 633.3-a.net from mainland China since 2016-12-02.
How can I access 633.3-a.net 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 633.3-a.net.
http://633.3-a.net · JSON