Can you open A21.yp.1337.cx/U9Y3f from mainland China?
N/A.
This domain doesn't resolve anywhere we test — including our control outside mainland China — so it appears inactive or unregistered rather than blocked.
2023first tested
4 mo agolast tested
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Frequently asked questions
Is A21.yp.1337.cx/U9Y3f blocked in mainland China right now?
As of the last test on 2026-03-29, A21.yp.1337.cx/U9Y3f is not resolvable from anywhere we test in mainland China, based on GreatFire's live Great Firewall measurements.
http://A21.yp.1337.cx/U9Y3f · JSON