The phenyl radical's electronic structure, magnetic inequivalency, spin Hamiltonian tensor components, and the relative orientation of their principal axes are computed by Neese's coupled-perturbed Kohn-Sham hybrid density functional (CPKS-HDF) technique in a moderate amount of time without resorting to expensive post-Hartree-Fock techniques. The g tensor component values are in excellent agreement with those determined experimentally and differ by less than 370 ppm. The computed hydrogen nuclear hyperfine tensors, A(H-1), are also found to be in very good agreement with their experimental counterparts. The correlation of the radical's electronic structure with its g and A numerical values corroborates that it has a (2)A(1) ground state. In accordance with our previous studies on the equivalency of planar radicals that possess C-2v symmetry, the in-plane g and A(H-1) principal axes should not be parallel to one another. Consequently, the spatially equivalent ortho (H-1(2), H-1(6)) and meta (H-1(3), H-1(5)) proton pairs should be magnetically inequivalent. This was confirmed in both the present computations and the simulation of the EPR solid-state spectrum. To the best of our knowledge, this is the first aromatic in-plane sigma-type radical whose magnetic inequivalency is studied both computationally and experimentally. To properly interpret the radical's electronic excitation spectra, the spectroscopy-oriented dedicated difference configuration interaction (SORCI) procedure was employed. Aside from a slight overestimation, the method seems to be capable of reproducing the C6H5 center dot electronic vertical excitation energies in the range of 0-50000 cm(-1). These vertical excitations, in conjunction with the corresponding orbit and spin orbit matrix elements, were also used to compute the g tensor components, employing the sum-over-states technique. Due to the limited number of computed roots and excited states, the results were marginally inferior to those obtained using the CPKS-HDF method.