Composition of the sample of 1646 ALMA calibrators with a flat radio spectrum and without a Roma-BZCAT counterpart in terms of their SIMBAD type. In blue: we present BL Lacs, in red: quasars (QSO), in violet: blazars, in green: radio sources (RS), in purple: active galactic nuclei (AGN), in brown: radio galaxies (RG), in yellow: sources without classification (No Type), in pink: galaxies (G), and in white: other type of sources (including galaxies in clusters, planetary nebulae, Seyfert galaxies, stars, etc).