BT-
Based on the VIN?
You can't base build order by the VIN. Since there are three different models produced on the same line, if your sequence number was 100292, that simply means that your truck was the two-hundredth, ninety-second build order at the factory, because that is when the VIN is assigned. Chances are, it is a very young ST, as the next-in-sequence VIN is assigned to the Explorer, Mountaineer, and ST. However, it could actually be the two-thousandth vehicle off the line. Ford VINs are tricky, and cannot really be used to verify when a vehicle came OFF the line, and in what sequence.
It's all very confusing. I've done a bit of research on Ford VINs for various reasons, and while there is a method to the madness with Ford, you really need build sheets to verify all the technical stuff, not VINs.