Location of the two breaks ν_c (top end) and ν_m (bottom part) at different epochs in the late-time evolution of the afterglow of GRB 100621A, for each of the three emission components (i) canonical afterglow (black); (ii) flares (red); and (iii) jump component (pink). Vertical bars indicate allowed ranges for ν_c or ν_m. The wavelength coverage of our instruments is shown as vertical bars at the very left side. Dashed lines show the expected evolution according to the standard fireball scenario after obeying the limits derived from our observations at various epochs.