They won't disappear. There is a process by which ICANN will assign another registry operator to continue hosting them: https://www.icann.org/resources/pages/eb

They won't disappear. There is a process by which ICANN will assign another registry operator to continue hosting them: https://www.icann.org/resources/pages/ebero-2013-04-02-en https://www.icann.org/resources/pages/ebero-2013-04-02-en (Note that all registries are continuously escrowing data on all domains on their TLDs on a daily basis for precisely this reason.)