not sure...
publicēja Jaro K - Vietas Alpes-Côte d'Azur province forums
... if this thread is still active as you might find lot of answers to your questions after your arrival. Anyway, in a case you are still looking for Carrefour in your area, you can use this link to localize a shop that is nearest to you...
http://www.carrefour.fr/magasin/trouver/?strCP=06000&str
Location=Ville