Is https://mozilla.cloudflare-dns.com/cdn-cgi/trace blocked in mainland China?

Part of cloudflare-dns.comMixed60 tested URLs

Can you open https://mozilla.cloudflare-dns.com/cdn-cgi/trace from mainland China?

No.

It's blocked — 100% of the last 1 conclusive tests failed in mainland China.

Access mozilla.cloudflare-dns.com with GreatFireVPN →

2022first tested

1/1blocked · last 90 days

1 mo agolast tested

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Other tested URLs on cloudflare-dns.com

Mixed36 blocked13 disrupted4 accessible7 no verdictAll 60 tested URLs on cloudflare-dns.com →

Blocking varies across cloudflare-dns.com: 36 blocked vs 4 accessible among tested hosts.

http://cloudflare-dns.comIntermittent https://cloudflare-dns.comBlocked https://cloudflare-dns.com/dns-queryas of 2026Blocked https://cloudflare-dns.com/dns-query?as of 2026Blocked https://cloudflare-dns.com/cdn-cgi/traceas of 2026Blocked https://Cloudflare-dns.com/dns-query?utm_source=chatgpt.comBlocked https://cloudflare-dns.com/dns-query?name=www.wcbss.edu.hk&type=ABlocked https://cloudflare-dns.com/dns-query?name=wft44maqb.me&ct=application%2Fdns-jsonas of 2026Blocked https://cloudflare-dns.com/dns-query?name=www.google.com&ct=application%2Fdns-jsonas of 2026Blocked https://Cloudflare-dns.com/dns-query?ct=application/dns-json&name=example.com&type=ABlocked https://cloudflare-dns.com/dns-query?dns=q80BAAABAAAAAAAAA3d3dwdleGFtcGxlA2NvbQAAAQABIntermittent https://dns.cloudflare-dns.comIntermittent http://odoh.cloudflare-dns.comBlocked https://tor.cloudflare-dns.comBlocked https://ns1.cloudflare-dns.comBlocked https://ns2.cloudflare-dns.comBlocked https://odoh.cloudflare-dns.comBlocked http://brave.cloudflare-dns.comas of 2026Intermittent https://dns64.cloudflare-dns.comUnresolvable http://chrome.cloudflare-dns.comIntermittent https://brave.cloudflare-dns.comas of 2026Blocked https://azure.cloudflare-dns.comBlocked https://opera.cloudflare-dns.comBlocked http://mozilla.cloudflare-dns.comIntermittent https://chrome.cloudflare-dns.comas of 2026Blocked https://family.cloudflare-dns.comas of 2026Blocked https://mozilla.cloudflare-dns.comas of 2026Blocked https://security.cloudflare-dns.comas of 2026Blocked https://00.family.cloudflare-dns.comIntermittent https://cloudflare.cloudflare-dns.comIntermittent https://tunnelbear.cloudflare-dns.comBlocked http://1dot1dot1dot1.cloudflare-dns.comBlocked https://1dot1dot1dot1.cloudflare-dns.comas of 2026Blocked https://gdfgdf.family.cloudflare-dns.comIntermittent http://chrome.cloudflare-dns.com/dns-queryIntermittent https://family.cloudflare-dns.com/dns-queryBlocked http://mozilla.cloudflare-dns.com/dns-queryIntermittent https://chrome.cloudflare-dns.com/dns-queryas of 2026Blocked https://mozilla.cloudflare-dns.com/dns-queryas of 2026Blocked https://dns.cloudflare-dns.com/cdn-cgi/traceIntermittent https://tor.cloudflare-dns.com/cdn-cgi/traceas of 2026Not blocked https://security.cloudflare-dns.com/dns-queryBlocked https://odoh.cloudflare-dns.com/cdn-cgi/traceas of 2026Blocked https://dooh.cloudflare-dns.com/cdn-cgi/traceas of 2026Blocked https://chrome.cloudflare-dns.com/cdn-cgi/traceBlocked http://chrome.cloudflare-dns.com:8443/dns-queryas of 2026Not blocked http://mozilla.cloudflare-dns.com:8443/dns-queryNot blocked https://6923948728641312.cloudflare-dns.com/dns-queryUnresolvable https://1dot1dot1dot1.cloudflare-dns.com/cdn-cgi/traceas of 2026Blocked https://1261246192389121238.cloudflare-dns.com/dns-queryUnresolvable https://4958734652234692634240724.cloudflare-dns.com/dns-queryUnresolvable https://mozilla.cloudflare-dns.com/dns-query?name=apv3.stel.com&type=TXTas of 2026Blocked https://mozilla.cloudflare-dns.com/dns-query?name=google.com&ct=application/dns-jsonas of 2026Blocked https://mozilla.cloudflare-dns.com/dns-query?name=www.google.com&ct=application/dns-jsonas of 2026Blocked https://000000000000000000000000000000000000000000000000000000000000000.family.cloudflare-dns.comIntermittent https://000000000000000000000000000000000000000000000000000000000000000.security.cloudflare-dns.comNot blocked https://161917203464672722071716235362920293737373010173738xxclapapqiqj.cloudflare-dns.com/dns-queryUnresolvable https://161917203464672722071716235362920293737373010173738890028972910.cloudflare-dns.com/dns-queryUnresolvable https://161917203464678171789623536752905393737373010173738890028972913.cloudflare-dns.com/dns-queryUnresolvable

Each verdict covers the last 90 days of tests, as on that URL's own page.

Frequently asked questions

Is https://mozilla.cloudflare-dns.com/cdn-cgi/trace blocked in mainland China right now?

As of the last test on 2026-08-20, https://mozilla.cloudflare-dns.com/cdn-cgi/trace is 100% blocked in mainland China, based on GreatFire's live Great Firewall measurements.

Why is https://mozilla.cloudflare-dns.com/cdn-cgi/trace blocked in mainland China?

It's blocked — 100% of the last 1 conclusive tests failed in mainland China.

Since when has https://mozilla.cloudflare-dns.com/cdn-cgi/trace been blocked?

GreatFire has recorded interference with https://mozilla.cloudflare-dns.com/cdn-cgi/trace from mainland China since 2022-08-16.

How can I access https://mozilla.cloudflare-dns.com/cdn-cgi/trace 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 mozilla.cloudflare-dns.com.

https://mozilla.cloudflare-dns.com/cdn-cgi/trace · JSON