Adrian Lane sent out a call signal to the ISS as it passed over his Gloucestershire house and was "stunned" when he received a reply.
"They came back to me and said, 'Receiving you - welcome aboard the International Space Station'," Lane said.
Lane, from Coleford, and a US astronaut chatted for about 45 seconds before the station went out of range, 'the BBC' reported.
"I asked him what the stars looked like from up there and he came back to me and said with no atmosphere up here the stars are really bright," Lane said.
ISS publishes its Amateur Radio frequencies on the ARISS website.
According to the website, some ISS crew members make random, unscheduled, amateur radio voice contacts with Earth-bound radio amateurs, often called "hams".
They can make radio contacts during their breaks, pre-sleep time and before and after mealtime. Astronauts have contacted thousands of hams around the world.
