Monday night the ccTLD .SE disappeared from the Internet – none of the Swedish Domain Names were reachable for a period of 20 minutes as of 10pm local time.According to people located in Sweden and several local publications any domain name under the .SE TLD did not resolve properly. Some of the articles say that the domain name was appended to itself and some of them say that an additional .se was appended, which could point to a wrongly placed “.” or additional “.se” in the registry’s zonefiles during a planned maintenance window. According to president Danny Aerts, the registry operator, the Internet Infrastructure Foundation, is investigating the cause of the issue which may have lasted longer for some users due to DNS information being cached. The .SE zone contains close to 905,000 domains.

[Updated] Find the original notification of the registry to its registrars after the jump. (more…)