.im is the Internet country code top-level domain (ccTLD) for the Isle of Man. It is administered by the Government of the Isle of Man and managed on a day to day basis by Domicilium, an offshore Internet Service Provider based on the Isle of Man.

On July 1, 2006, .im registration was made by available to anyone in the world, including one, two, and three letter domains directly under .im, which opens up the possibility of .im domain hacks. The domain is becoming popular with companies who produce instant messaging (IM) software with names registered by Adium, ejabberd, Coccinella, Meebo, Pandion, Pidgin, Prosody, Trillian, and Yahoo! among others. .IM is also used in German, French and Italian speaking countries (i.e. Germany, Austria, Luxemburg, Switzerland, France, Italy and part of Belgium) for Real Estate purposes (Immobilien in German, Immobilier in French, Immobiliare in Italian). .IM also sounds like the phrase "I'm" (short for "I am") in English. The abundance of available short names is also making the domain popular for personal use.