Our provider informs us that they intend to migrate CTAN's Root Server to another hardware at some unspecified time after 8:00 UTC tomorrow, Wed 16 July 2017.
This maintenance will lead to a downtime of a few hours.
All CTAN services -- website, uploads, general email contacts etc. -- will therefore be interrupted during that period.
We apologize for the inconvenience.
Kind regards Petra RĂ¼be-Pugliese for the CTAN team