It is made up of several frazioni (locally officially called hameaux, in French), the two major ones being Antagnod which holds the town hall and the main parish, and Champoluc.
This pieve or confederation of communes (comprehending the near villages of Caslino, Castelmarte, Proserpio, Eupilio, Longone, some frazioni of the current commune of Erba, and having Canzo as capital) from 784 to Martesana zone (the region straight north to Milan roughly corresponding to Brianza historical and cultural region).
The municipality of Carpaneto Piacentino contains the frazioni (subdivisions, mainly villages and hamlets) Zena, Celleri, Ciriano, Chero, Cimafava, Viustino, Travazzano, Badagnano, Rezzano, Magnano, and Montanaro.
The municipality of Casale Corte Cerro contains the frazioni (subdivisions, mainly villages and hamlets) Arzo, Cafferonio, Cassinone, Cereda, Crebbia, Crottofantone, Gabbio, Montebuglio, Motto, Pramore, Ramate, Ricciano, Sant'Anna, and Tanchello.
The municipality of Tagliolo Monferrato contains the frazioni (subdivisions, mainly villages and hamlets) Cherli, Grossi, Varo, Pessino, Caraffa, and Mongiardino.