This is a funny question ! First,,exactly how did you get the vin number ? If you physically got it off of the vehicle,,why didnt you look under the front end of the jeep for the axle differential and the transfer case ?
If you got the vin number over the phone,,you could of asked the seller if the jeep was 2wd or 4wd.
you will find a chart for vin numbers in any service manual that covers the year model of this particular jeep model.