User blog comment:Thetwindler/Which class of demon is the most powerful?/@comment-31767970-20190325071416/@comment-32739188-20190325084739

Despite the fact that Alastair's exact age was never confirmed, two facts confirm that he is Ancient.

Alastair described Ruby as quite young compared to himself.

He called death an old friend, who according to Bobby Singer's statement from the episode Die Hoffnung dies ... was locked up when Noah had built the ark.

These facts speak for the Alastair immediately at the same time as Lilith was created or that he was created at the same time as Lilith, the only demons as old as Alastair are the princes of hell.Alastair is confirmed with these facts at least as old as the Princes of Hell and that should someone in the trivia rubric.