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Denic Restores .de Sites After DNSSEC Glitch Affects 3.6%

5/7/2026

25 5 Full Breakdown

Summary

Story summary

Denic fixed the DNSSEC signature error that knocked out most German .de sites on April 5, restoring normal service.
The outage affected only the 3.6 % of .de domains that use DNSSEC, disrupting hundreds of thousands of websites.
Engineers detected the problem at 21:57 on April 5 and deployed the fix by 01:15.
Some commentators linked the glitch to a zone-signing-key rollover, but Denic has not confirmed this explanation.

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Story summary

Denic fixed the DNSSEC signature error that knocked out most German .de sites on April 5, restoring normal service.
The outage affected only the 3.6 % of .de domains that use DNSSEC, disrupting hundreds of thousands of websites.
Engineers detected the problem at 21:57 on April 5 and deployed the fix by 01:15.
Some commentators linked the glitch to a zone-signing-key rollover, but Denic has not confirmed this explanation.