 There was one letter denoting vehicle type, two-digit number denoting voivodeship, and three-digit individual number after a dash.Letters A, B, C, D, E, H, K, L, X, Y, Z were used for cars, trucks and buses, T for taxicabs, M, N, P, R, S, U for motorcycles and W for military vehicles.A range of numbers 00 to 19 meant capital city of Warsaw, 20 to 24 - Białostok Voivodeship, and so on, in alphabetical order, up to 95 to 99 for Wołyńskie Voivodeship.