it looks like it was a belgian photography site ... photography courses , forums , etc ...
in one of the archived pages it has a link to XP4.be which is the site they operate now ... here is the translated version by Google (Google Language Tools) ... "ENTREZ" (mistakenly translated "E NR T R E Z") means "ENTER" in french) ... it seems like they were using both , kept the .be and dropped the .info ...
on XP4.be and on the archived pages it mentions that XP4 is an asbl (association sans but lucratif) , which basically translates to "non-profit-organization"