What layer are space shuttles and satellites found?

Space shuttles and satellites are primarily found in the exosphere, which is the outermost layer of Earth's atmosphere, starting around 600 kilometers (373 miles) above sea level and extending into outer space. However, many satellites operate in lower layers, such as the thermosphere, where the International Space Station orbits at about 400 kilometers (248 miles). The specific altitude depends on the satellite's purpose and mission requirements.