Switzerland is seventh, its highest position since 1995.
The Netherlands is No. 8 and will be seeded if Uruguay is eliminated. Italy is officially tied at No. 8, though it trails the Dutch by decimal points.
Seedings in the European playoffs were also decided by Thursday's rankings.
Portugal (No. 14), Greece (No. 15), Croatia (No. 18) and Ukraine (No. 20) will be seeded in next Monday's draw. France (No. 21) missed out by a single ranking point, 871-870.
Sweden (No. 25), Romania (No. 29) and Iceland (No. 46) are also involved.
The United States remains at No. 13 despite two victories in qualifiers against Jamaica and Panama. Mexico drops three to No. 24, and will face New Zealand down 12 to No. 79 in a playoff next month.
Ivory Coast, which beat Senegal 3-1 in the first leg of a playoff last weekend, is the best of Africa at No. 17.
Japan leads Asia, despite dropping two to No. 44. The other Asian teams at the World Cup are Iran (No. 49), South Korea (No. 56) and Australia (No. 57).