Looks like ADSB is filtering out the mil aircraft. Probably plenty aloft just not showing.
First name Asterot this is a variation of Astaroth.
Astaroth (also Ashtaroth, Astarot and Asteroth), in demonology, is the Great Duke of Hell in the first hierarchy with Beelzebub and Lucifer; he is part of the evil trinity. He is a male figure most likely named after the Near Eastern goddess Astarte.
Check the various variations of spelling of the name. Can be spelled with or without H.
Noice complete with D-21.