By 2009, Prague (A) has reached the combination 9"x"9 9999 in its respective series; consequently it then started issuing plates which included a two-letter combination in the format 1"xa" 0000 to 9"xa" 9999, where "x" is the regional letter and "a" is a letter in alphabetical order (so that 1AA 9999 is followed by 1AB 0000, and so on). Shortly after that the Central-Bohemian region came. As of the beginning of the summer 2014, the South Moravian (B) and Moravian-Silesian in the November, lastly in April 2019 the Usti region. Regions were also issuing registration marks with two-letter combinations.