Chamonix Office +33 (0)4 50 53 00 88, Maison de la montagne, 190 place de l'église, 74400 Chamonix
Argentière Office +33 (0)4 50 54 17 94 , 24 Route du village, 74400 Argentière
Groups publish these on their own leak sites. A claim is not a confirmed breach — treat every entry as an assertion, not a fact.