Can you open sundial.columbia.edu from mainland China?
Not sure yet.
There isn't enough recent data to reach a verdict.
2015first tested
7 mo agolast tested
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Other tested URLs on columbia.edu
Blocking varies across columbia.edu: 3 blocked vs 34 accessible among tested hosts.
http://columbia.eduas of 2026Not blockedhttps://columbia.eduas of 2026Not blockedhttp://gs.columbia.eduas of 2026Intermittenthttp://ce.columbia.eduNot enough datahttp://www.columbia.eduNot blockedhttp://ssol.columbia.eduNot blockedhttp://wind.columbia.eduUnresolvablehttps://www.columbia.eduNot blockedhttps://www1.columbia.eduas of 2026Not blockedhttp://tibet.columbia.eduas of 2026Not blockedhttp://www.cs.columbia.eduIntermittenthttp://soc.cs.columbia.eduas of 2026Not blockedhttp://vpn.cc.columbia.eduNot enough datahttps://my.tc.columbia.eduNot blockedhttp://barnard.columbia.eduas of 2026Not blockedhttp://college.columbia.eduNot blockedhttps://www.cs.columbia.eduas of 2026Not blockedhttp://www.math.columbia.eduas of 2025Intermittenthttp://www.columbia.edu/weaias of 2026Not blockedhttp://lionmail.columbia.eduas of 2026Blockedhttp://www8.gsb.columbia.eduas of 2026Not blockedhttp://apply.med.columbia.eduas of 2025Not blockedhttp://ce.columbia.edu/summerNot enough datahttps://harriman.columbia.eduas of 2026Not blockedhttp://afe.easia.columbia.eduNot blockedhttp://canvas.gsb.columbia.eduNot blockedhttp://cubmail.cc.columbia.eduUnresolvablehttps://canvas.gsb.columbia.eduas of 2026Not blockedhttp://courseworks.columbia.eduNot blockedhttp://engineering.columbia.eduNot blockedhttp://worldleaders.columbia.eduas of 2026Not blockedhttps://courseworks2.columbia.eduas of 2026Not blockedhttp://lionmail.columbia.edu/loginBlockedhttp://www.columbia.edu/cu/falundafaas of 2026Blockedhttps://epiville.ccnmtl.columbia.eduNot blockedhttps://academiccommons.columbia.eduas of 2026Not blockedhttps://www.columbia.edu/cu/falundafaas of 2026Not blockedhttp://www.math.columbia.edu/~woit/wordpressNot blockedhttp://www.cs.columbia.edu/education/ms/regfaqIntermittenthttp://afe.easia.columbia.edu/cosmos/index.htmNot blockedhttps://tibetanmaterialhistory.wikischolars.columbia.eduUnresolvablehttps://www1.columbia.edu/sec/cu/isso/OPT_Reporting.htmlNot blockedhttps://courseworks2.columbia.edu/courses/164868/quizzes/139313Not blockedhttps://jia.sipa.columbia.edu/master-narratives-disinformation-campaignsas of 2026Not blockedhttps://sso.tc.columbia.edu/app/salesforce/exkg9cr6guo6vsZ5m697/sso/samlas of 2026Not blockedhttps://art.afe.easia.columbia.edu/cgi-bin/museums/search.cgi/country?country_id=1Not blockedhttps://cas.columbia.edu/cas/login?SAMLRequest=fVJNb9QwEL0j8R8s3%2FMpgYq1SbW0qlipQNRNOXBz7Mmui+0JHmcX%2Fj3ebKu2B3p9fvM+xrO6%2FOMsO0Agg77hVV5yBl6hNn7X8Pv+Jrvgl+37dyuSzk5iPce9v4PfM1BkadKTWB4aPgcvUJIh4aUDElGJ7frrrajzUkwBIyq0nG2uG+5HGEZAfJB62KsJtLHj6N0vi+5hsANot blockedEach verdict covers the last 90 days of tests, as on that URL's own page.
Frequently asked questions
Is sundial.columbia.edu blocked in mainland China right now?
As of the last test on 2026-01-13, sundial.columbia.edu is not enough data in mainland China, based on GreatFire's live Great Firewall measurements.
http://sundial.columbia.edu · JSON