At what altitude is the exosphere generally found?

The exosphere is the outermost layer of Earth's atmosphere, extending from about 400 kilometers above sea level. This layer marks the transition from the atmosphere into outer space. While the exact altitude can vary slightly based on different factors and definitions, the generally accepted boundary for the exosphere lies around this height.

At 400 kilometers, the atmosphere becomes extremely thin, with only a few particles present per cubic centimeter, and it is where satellites can orbit the Earth with minimal atmospheric drag. This unique feature distinguishes the exosphere from the other layers of the atmosphere, which are found at lower altitudes. As such, this answer accurately identifies the typical elevation where the exosphere is located.