Can you open slack.com:80 from mainland China?
Not sure yet.
There isn't enough recent data to reach a verdict.
2015first tested
2 mo agolast tested
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Other tested URLs on slack.com
http://slack.comas of 2026Not blockedhttps://slack.comNot blockedhttps://slack.com/apiIntermittenthttps://slack.com/signinas of 2026Not blockedhttps://slack.com/createNot blockedhttp://slack.com/help/testNot blockedhttps://slack.com/intl/en-auas of 2026Not blockedhttps://slack.com/intl/en-twNot blockedhttps://slack.com/ssb/download-winNot blockedhttps://slack.com/lp/two?cvosrc=ppc.google.slack&cvo_campaign=&cvo_crid=218176748109&Matchtype=e&utm_source=google&utm_medium=ppc&utm_campaign=brand_hv&c3api=5523%2C218176748109%2Cslack&gclid=EAIaIQobChMIvcn-i6Dl1gIV1oloCh05JARbEAAYASAAEgJup_D_BwE&gclsrc=Not blockedhttp://www.slack.comas of 2026Not blockedhttp://app.slack.comas of 2026Not blockedhttp://ler.slack.comas of 2026Not blockedhttps://www.slack.comas of 2026Not blockedhttps://api.slack.comas of 2026Not blockedhttps://app.slack.comas of 2026Not blockedhttp://phptw.slack.comas of 2026Not blockedhttp://buttl.slack.comNot blockedhttp://files.slack.comas of 2026Not blockedhttps://join.slack.comNot blockedhttps://phptw.slack.comas of 2026Not blockedhttps://edanz.slack.comas of 2026Not blockedhttp://ttmgmt.slack.comNot blockedhttp://doulab.slack.comNot blockedhttp://trivago.slack.comas of 2025Not blockedhttps://cs4105.slack.comas of 2026Not blockedhttp://tahtong.slack.comas of 2026Not blockedhttps://nparov.slack.comas of 2026Not blockedhttp://wur-grs.slack.comNot blockedhttps://status.slack.comas of 2026Not blockedhttps://trivago.slack.comNot blockedhttps://alkanza.slack.comNot blockedhttp://aobolulu.slack.comas of 2026Not blockedhttp://applatix.slack.comNot blockedhttps://samsung.slack.comNot blockedhttps://wur-grs.slack.comas of 2026Not blockedhttp://hackclub.slack.comas of 2026Not blockedhttp://aboutgolf.slack.comas of 2026Not blockedhttp://tinyspeck.slack.comas of 2026Not blockedhttps://sparemin.slack.comNot blockedhttp://crowdynews.slack.comas of 2026Not blockedhttps://aboutgolf.slack.comNot blockedhttp://utemba2016.slack.comas of 2026Not blockedhttps://bluecrane.slack.comas of 2026Not blockedhttps://nflsalumni.slack.comas of 2026Not blockedhttps://maze-reload.slack.comas of 2026Not blockedhttp://sappayagroup.slack.comNot blockedhttps://cni-digital.slack.comNot blockedhttp://virgocluster.slack.comNot blockedhttp://wizconnected.slack.comas of 2026Not blockedhttp://Pioniergarage.slack.comNot blockedhttp://rsafirstwatch.slack.comas of 2026Not blockedhttps://winkanimation.slack.comNot blockedhttps://ibm-whitewater.slack.comNot blockedhttps://scis-histechteam.slack.comNot blockedhttps://azdwgsdgz45gm3nv.slack.comNot blockedhttps://bluecrane.slack.com/messagesIntermittenthttp://openstackfoundation.slack.comas of 2026Intermittenthttp://oaknorth-enterprise.slack.comas of 2026Not blockedhttp://qlikapacpresalesmgrs.slack.comNot blockedhttps://mckinsey.enterprise.slack.comNot blockedhttp://machinevisionproducts.slack.comas of 2026Not blockedhttps://kantoliving.slack.com/messagesNot blockedhttps://promotionnotification.slack.comNot blockedhttps://mck-td.slack.com/ssb/signin_redirectNot blockedhttps://nyaa-nyaa.slack.com/messages/C02FSFF1Eas of 2026Not blockedhttps://machinevisionproducts.slack.com/signupas of 2026Not blockedhttps://privacyrulesltd.slack.com/plans/standardas of 2026Not blockedhttps://app.slack.com/client/TB8C16YS3/DQC7N6LPN?cdn_fallback=2&recommended_build_version=1713836546&build_manifest_last_modified=1713840351as of 2026Not blockedEach verdict covers the last 90 days of tests, as on that URL's own page.
Frequently asked questions
Is slack.com:80 blocked in mainland China right now?
As of the last test on 2026-06-07, slack.com:80 is not enough data in mainland China, based on GreatFire's live Great Firewall measurements.
https://slack.com:80 · JSON