Why is that important to you?.... you should try their websites , under biography.... but this what I know..... PvD,Chris Liebing,Kai Tracid,Sven Vaeth,Blank&Jones,TallaXL,Taucher,NuBreed/ Germany Tiesto&Armin van Buuren,Johan Gielen /Netherlands Sasha,Digweed,Oakenfold,Pete Tong,Judge Jules,Lisa Lashes/ GB Mauro Picotto/ Italy Christopher Lawrence, Sandra Collins, Icey, Irene, Diseslboy, Ak1200, etc....etc.incl.. most of all the other ones are from the USA in regards to age..... my guess is that Sasha,Digweed, Oakenfold, Tong,PvD,Dave Ralph are all somehwere mid 30 to beginning 40, where as Sven Vaeth is probably the Grandfather of all .