Many domains ending in .de, Germany’s country-code TLD, have seen downtime today, after something went wrong at Denic, the registry manager.
Details are sketchy at the moment, but it appears from chatter on the DNS-Ops mailing list that several instances of the .de zone stopped serving addresses this morning.
It appears that the affected servers were responsible for .de domains beginning with F through Z, so facebook.de would have worked, but heise.de would not.
This is obviously a huge headache if you’re German or do business in Germany — I hate to think how many transactions could have been disrupted by the downtime — and I expect Denic will take a lot of flack at home over the coming days and weeks.
The problem, however, does appear to have been fixed. SANS estimates the outage as a little over an hour.