Validate Microsoft SKU

I was asking how I can validate Microsoft SKU# numbers?  Such as 

0198EE56-DB84-4F71-A798-F5A497CE20D6
031C9E47-4802-4248-838E-778FB1D2CC05
03405002-98E6-4B13-B975-550FC5374C8D
05933B83-04D1-4AC6-BFCD-DBBBFC834483