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Hostiaz was commune in the Auvergne-Rhône-Alpes region in the Ain department in east France. On 1 January 2019, it became part of a new commune called Plateau d'Hauteville.[1]

References[change | change source]

  1. Arrêté préfectoral Archived 2018-12-22 at the Wayback Machine, 12 December 2018 (in French)