The H -T phase diagrams of single crystalline electron-doped K 0.83 Fe 1.83 Se 2 (KFS1), K 0.8 Fe 2 Se 2 (KFS2) and hole-doped Eu 0.5 K 0.5 Fe 2 As 2 (EKFA) have been deduced from tunnel diode oscillator-based contactless measurements in pulsed magnetic fields up to 57 T for the interplane (H c) and in-plane (H ab) directions. The temperature dependence of the upper critical magnetic field H c2 (T ) relevant to EFKA is accounted for by Pauli model including an anisotropic Pauli paramagnetic contribution (μ B H p = 114 T for H ab and 86 T for H c). This is also the case of KFS1 and KFS2 for H ab whereas a significant upward curvature, accounted for by a two-gap model, is observed for H c. Despite the presence of antiferromagnetic lattice order within the superconducting state of the studied compounds, no influence of magnetic ordering on the temperature dependence of H c2 (T ) is observed.