Can you open u2.duckdns.org/go/3d from mainland China?
Not sure yet.
There isn't enough recent data to reach a verdict.
2015first tested
1 mo agolast tested
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Other tested URLs on duckdns.org
Blocking varies across duckdns.org: 27 blocked vs 7 accessible among tested hosts.
http://duckdns.orgBlockedhttps://duckdns.orgNot blockedhttps://duckdns.org/updateas of 2026Not blockedhttp://55.duckdns.orgNot enough datahttp://66.duckdns.orgNot enough datahttp://77.duckdns.orgNot enough datahttp://u2.duckdns.orgNot enough datahttp://e6.duckdns.orgas of 2024Blockedhttp://227.duckdns.orgas of 2024Blockedhttp://329.duckdns.orgNot enough datahttp://332.duckdns.orgNot enough datahttp://336.duckdns.orgas of 2026Blockedhttp://556.duckdns.orgNot enough datahttp://233.duckdns.orgBlockedhttp://357.duckdns.orgas of 2025Blockedhttp://722.duckdns.orgNot enough datahttp://522.duckdns.orgNot enough datahttp://921.duckdns.orgas of 2024Blockedhttp://356.duckdns.orgNot enough datahttp://236.duckdns.orgNot enough datahttp://225.duckdns.orgNot enough datahttp://776.duckdns.orgNot enough datahttp://339.duckdns.orgNot enough datahttp://www.duckdns.orgas of 2026Blockedhttp://hui.duckdns.orgNot enough datahttp://yy4.duckdns.orgNot enough datahttp://iok.duckdns.orgas of 2026Blockedhttp://itmc.duckdns.orgNot enough datahttp://66.duckdns.org/fNot enough datahttps://www.duckdns.orgas of 2026Not blockedhttp://8bit.duckdns.orgBlockedhttps://iok.duckdns.orgNot blockedhttps://hui.duckdns.orgNot enough datahttps://yy4.duckdns.orgUnresolvablehttp://r207.duckdns.orgNot enough datahttp://g4li.duckdns.orgas of 2023Blockedhttp://ionel.duckdns.orgNot enough datahttp://66.duckdns.org/ffNot enough datahttp://77.duckdns.org/tvNot enough datahttp://236.duckdns.org/fNot enough datahttp://k3.duckdns.org/5wNot enough datahttp://leapp.duckdns.orgas of 2026Blockedhttp://78977.duckdns.orgIntermittenthttp://nukia.duckdns.orgBlockedhttps://xeth.duckdns.orgUnresolvablehttp://356.duckdns.org/tvNot enough datahttp://921.duckdns.org/tvas of 2023Blockedhttp://236.duckdns.org/ffNot enough datahttps://ertel.duckdns.orgas of 2025Not blockedhttps://rg13p.duckdns.orgas of 2024Not blockedhttp://chtway.duckdns.orgNot enough datahttp://pigcat.duckdns.orgNot enough datahttp://makblr.duckdns.orgNot enough datahttps://ubwin.duckdns.orgNot enough datahttp://cwcyrix.duckdns.orgNot enough datahttp://gpwheek.duckdns.orgUnresolvablehttp://e7.duckdns.org/go/5as of 2024Blockedhttp://e7.duckdns.org/go/7as of 2024Blockedhttp://jackawu.duckdns.orgNot enough datahttp://krislam.duckdns.orgNot enough datahttp://andypi2.duckdns.orgNot enough datahttp://yanshui.duckdns.orgNot enough datahttps://home27.duckdns.orgas of 2023Not blockedhttp://ruyonet.duckdns.orgas of 2026Blockedhttp://fresnel.duckdns.orgas of 2025Blockedhttps://novpnn.duckdns.orgas of 2025Blockedhttp://blproxy.duckdns.orgNot enough datahttp://jjhenus.duckdns.orgNot enough datahttps://myhome.duckdns.orgNot enough datahttp://h23.duckdns.org/go/2as of 2023Blockedhttp://ssu.duckdns.org/go/7as of 2024Blockedhttp://h23.duckdns.org/go/7Not enough datahttp://ssu.duckdns.org/go/5as of 2024Blockedhttp://h23.duckdns.org/go/5as of 2023Blockedhttp://u2.duckdns.org/go/9sNot enough datahttp://u2.duckdns.org/go/5vBlockedhttp://ss2.duckdns.org/go/2as of 2024Blockedhttp://ss2.duckdns.org/go/7as of 2024Blockedhttp://ss2.duckdns.org/go/9as of 2024BlockedEach verdict covers the last 90 days of tests, as on that URL's own page.
Frequently asked questions
Is u2.duckdns.org/go/3d blocked in mainland China right now?
As of the last test on 2026-06-18, u2.duckdns.org/go/3d is not enough data in mainland China, based on GreatFire's live Great Firewall measurements.
http://u2.duckdns.org/go/3d · JSON