your are going to meat a tall dark stranger... NO that's not it
1965 the year of your car's manufacture (hopefully no surprise there.
16439 this is your style of car which is an Impala V8 four door sport sedan.
ATL tells me you could be a Braves fan, or a Hawks fan or maybe a Falcons fan because your car was made in Atlanta Georgia and they don't tend to wander too far from their origins.
23036 is the sequence number of your car from the Fisher Body plant in Atalanta. It starts at every plant every year over again.
842 is the color of your interior which was a blue cloth and vinyl bench seat
DC is your paint code which was an Ermine White over Mist Blue exterior paint color combination.
W tells me you have a tinted windshield, but plain glass every where else (unusual with A/C that usually had all glass tinted).
O tells me that your car has a two tone paint job (It's like deja vu all over again)
2 is for the next set of options (they never print out option group number 1 for some reason)
K is for air conditioning and
S is for the rear antenna option (as opposed to only one on the front fender.)
3 (is for the third of five option groups group option: which generally is typed out)
L is for rally sport which I assume means 14x6 inch Kelsey-Hayes Rally wheels with trim rings and hats.