  We compute the spectrum of quasinormal frequencies of regular black holes
obtained in the presence of Non-Linear Electrodynamics. In particular, we
perturb the black hole with a minimally coupled massive scalar field, and we
study the corresponding perturbations adopting the 6th order WKB approximation.
We analyze in detail the impact on the spectrum of the charge of the black
hole, the quantum number of angular momentum and the overtone number. All modes
are found to be stable. Finally, a comparison with other charged black holes is
made, and an analytical expression for the quasinormal spectrum in the eikonal
limit is provided.
