The call sign of the Apollo 11 lunar module was Eagle.
Apollo 11’s lunar module, built by Grumman and designated LM-5, carried Neil Armstrong and Buzz Aldrin from lunar orbit to the surface in July 1969. The crew chose “Eagle” as its name, echoing the bald eagle shown on the mission patch and symbolizing the United States’ effort to reach the Moon.
Eagle separated from the command module Columbia in lunar orbit on July 20, 1969. Armstrong and Aldrin landed in the Sea of Tranquility, where Armstrong became the first person to step onto the Moon. After the surface expedition, Eagle’s ascent stage lifted the astronauts back into lunar orbit for rendezvous with Michael Collins aboard Columbia.
The spacecraft names are often confused because Columbia was Apollo 11’s command module, not its lunar module. Snoopy was the Apollo 10 lunar module, while Antares belonged to Apollo 14. While Eagle was on the lunar surface, the crew also used “Tranquility Base” as the location call sign.