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Outage in HetrixTools

DENIC issues with resolving .DE domains

Resolved Minor
May 05, 2026 - Started 5 days ago - Lasted about 2 hours
Official incident page

Incident Report

We've been internally alerted of a higher-than-usual fail rate for our Uptime Monitoring system. The DENIC domain registry is currently having issues, causing most of the .DE domains to not resolve. Our system is currently detecting these uptime monitors as being down, as it should be, since they are not resolving properly. Sources: https://status.denic.de/pages/incident/592577eab611ce1e0d00046f/69fa60ef9d12f5057a974f38 https://news.ycombinator.com/item?id=48027897 https://www.reddit.com/r/de_EDV/s/vh0wekNZ3p This issue is out of our hands, and our system is working as expected. We're posting this here so that our users are informed of what is happening with their .DE uptime monitors. We'll continue to monitor the situation as it progresses.

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RESOLVED 5 days ago - at 05/05/2026 11:12PM

This incident has been resolved.

IDENTIFIED 5 days ago - at 05/05/2026 09:26PM

We've been internally alerted of a higher-than-usual fail rate for our Uptime Monitoring system.
The DENIC domain registry is currently having issues, causing most of the .DE domains to not resolve.
Our system is currently detecting these uptime monitors as being down, as it should be, since they are not resolving properly.

Sources:
https://status.denic.de/pages/incident/592577eab611ce1e0d00046f/69fa60ef9d12f5057a974f38
https://news.ycombinator.com/item?id=48027897
https://www.reddit.com/r/de_EDV/s/vh0wekNZ3p

This issue is out of our hands, and our system is working as expected. We're posting this here so that our users are informed of what is happening with their .DE uptime monitors.

We'll continue to monitor the situation as it progresses.

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