  In the present paper we consider the Type-2.x and Type-3.x extraterrestrial
von-Neumann probes and study the problem of their detectability by the world's
largest radio telescope: the Five-hundred-meter Aperture Spherical Radio
Telescope (FAST). For this purpose we estimate the radio spectral parameters
and analyse the obtained results in the context of technical characteristics of
FAST. As a result, it is shown that FAST can detect as galactic as well as
extragalactic self-replicating probes with high precision.
