there is a web domain for antarctica. it's .aq. so in case you are an enterprising young antarctican who wants to start a website, this is something to keep in mind. i don't feel i need to elaborate on the absurdity of this fact any further.
there are also, of course, internet codes for all the usual loser countries that we know so well. such as .li for liechtenstein and .va for vatican city. north korea has .kp but i don't know who's using it. and then there is the ultimate mystery: .nt for the "neutral zone." i suppose they're planning ahead for when starfleet decides to demarcate some buffer room between us and the klingons.