As far I’ve understood (thanks to other people from several platforms)
Hex address is
Voxel X (4 digits in hex) : Voxel Y (4) : Voxel Z (4) : Solar System Index (4)
Portal corresponding glyphs combination is
Planet number (1) : SSI (3) : VY - 7F (2) : VZ - 7FF (3) : VX - 7FF (3)
