It was the domain name of nic.alsace, used for the .alsace registry. This name is required by the ICANN for new extensions, for technical purposes. The registry website provides all the information on the .alsace schedule, how to register domains and loads of other information. As soon as the registry was able to create domains, it did: www.mondomaine.alsace
The website www.mondomaine.alsace was the first one to use the .alsace extension on the Internet. To enable .alsace to exist, the ICANN (Internet Corporation for Assigned Names and Numbers) requires that there be an official registrar. The official registrar communicates from a dedicated address: information on the scheduling of .alsace, how to register domains, news and advice. Go to www.mondomaine.alsace!