Final Report: DNS Outage of 5 May 2026
Final assessment, based on the initial analysis of 8 May 2026 and the comprehensive follow-up examination
Our Activity Report is here!
2025 – a year of shared innovation
For DENIC, 2025 was a year of key decisions. The focus was on implementing the NIS 2 Directive.
The new composition of the Executive Board and Supervisory Board has further consolidated the development of our Cooperative, and Barbara Stolz, as the new Executive Board
Analysis of the DNS outage on 5 May 2026
During a routine DNSSEC key rollover on 5 May 2026, some non-validatable signatures were generated and distributed. As a result, validating resolvers were temporarily unable to successfully verify their DNS responses for .de domains. This led to noticeable restrictions in the accessibility of .de domains for approximately three hours.
Technical issue with .de domains resolved
Invalid DNSSEC signatures affected accessibility – normal service has been restored.
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