There are even more: -Kazakhstan, Georgia, Azerbaijan (Europa+Asia) -Colombia or Panama (North+South America, border between continents isn't clear) -Indonesia (Isles of New Guinea, Timor and Maluku don't belong to Asia) I did not include the remaining colonial powers.
Theres also: - Spain, who has a bit of land on the north edge of Africa. - UK, who has a bunch of small colonised land nearly everywhere. - Denmark, if you count Greenland being part of it. - New Zealand, Australia, France, Norway, UK, Chile and Argentina all claimed territories in Antartica.