theres a good chance thats close to impossible...
i mean i can BARELY hit f2, and by the time im at like d4 or c5, im in falsetto, so while i can reach that pitch, it doenst "count" in your vocal range
i think im somewhere in between baritone and tenor..
ive heard of singers that can go 6 octaves, but theyre professionsals and im sure that includes falsetto, even 4 is alot to do well i believe