This is a list of notable interstellar radio messages (IRMs) transmitted from Earth. Many of these were sent in the aim of searching for extra-terrestrial intelligence (SETI), and are often called 'active SETI' or 'METI' (Messages to Extra-Terrestrial Intelligence) projects.
Stars to which messages were sent include:
Some other projects include:
Whilst not an interstellar message, it is also worth mentioning The Morse Message (1962), which was sent to Venus.