Magnitude distributions of the host galaxies of radio sources in optical (SpARCS and PanSTARRS) to IR bands in ELAIS-N1. Each panel also shows the same for the subset of radio sources with radio flux densities >1mJy (pink) and >10mJy (blue). The numbers in each panel corresponds to the fraction of all radio sources with a counterpart detected in that band, for all sources, and for >1 and >10 mJy sources. The identification fraction increases with wavelength from ~56% in u-band up to 96% in 4.5 μm.