It borders on ( clockwise from the North ) the Netherlands , Germany , Luxembourg and in Belgium the provinces of Luxembourg , Namur , Walloon Brabant ( Wallonia ) , and those of Flemish Brabant and Limburg ( Flanders ) . It borders on ( clockwise from the north ) the Netherlands , Germany and in Belgium the provinces of Luxembourg , Namur , Walloon Brabant ( Wallonia ) , and those of Flemish Brabant and Limburg ( Flanders ) .