Is Cernet down right now?
No one has reported a problem in the last hour.
About Cernet
The domain was registered 31 years ago through Xiamen 35.com Information Co., Ltd.. The Internet Archive first captured it in 1998. It ranks #9,270 among the most visited sites in the world on the Tranco list. It is hosted in CN on the China Education and Research Network Center network.
The most recent problem was a slowdown on 22 September 2026 at 22:00 UTC, which lasted 2 h 17 min. That is the only incident in the last 90 days, 2 h 17 min of downtime in total, and 88.46% of our checks succeeded.
Reports, last 24 hours
0 reports · normally about 3 per hour| Problem reported | No reports in the last 24 hours. |
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One email when cernet.net goes down and one when it recovers. No account needed; unsubscribe from any email.
What we checked
05:00:39 UTC| Layer | Result | Outcome |
|---|---|---|
| DNS name lookup | cernet.net resolves to 202.205.109.155 (AS4538 China Education and Research Network Center) | pass |
| TLS certificate | Certificate from Let's Encrypt, expires 2026-11-11 | pass |
| HTTP, Phoenix | HTTP 200 in 3.82 s 3 h ago | pass |
| Content | Page title: “China Education and Research Network (CERNET)” | – |
| Reputation | Trust score 100/100 · trust check | Established |
Outage history, 90 days
| Started (UTC) | Incident | Duration |
|---|---|---|
| 2026-09-22 22:00 | Slow | 2 h 17 min |
Common questions
Is Cernet down for everyone or just me?
Compare the test from your browser above with our server checks. If our servers reach cernet.net and your browser cannot, the problem is on your connection, DNS or network. If both fail, the site is down.
How do you know if Cernet is down?
We request the homepage from 8 locations, check DNS, the TLS certificate and the HTTP response, and compare the page content with what we saw before. We also read the service's official status feed where one exists and count visitor reports against the usual rate for the hour.
What can I do while it is down?
Subscribe to the alert on this page and we will email you when it recovers. Clearing your DNS cache or switching networks only helps when our servers can reach the site and your browser cannot.