Even the most sophisticated radio arrays have not yet detected any signals that could have possibly been beamed through space by aliens. But maybe we just need to approach the search for technosignatures differently. Maybe aliens have no interest in phoning Earth, and would rather transmit message to their own probes orbiting nearby planets.
Whether aliens have any desire to explore space like we do is unknown. They might be content kicking back on whatever passes for a hammock on their own planets. But it is hard to believe that (if anything remotely like us exists out in the cosmos) there wouldn’t be at least one form of intelligent life that would want to see what lies beyond their home turf. Whether they whiz through the void in flying saucers or starships is debatable, but they might be sending and receiving signals from their own contraptions launched into space to explore their cosmic neighborhoods—much like we do.
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