How to generate 16 digit unique random alpha numeric numbers?

Originally Posted by SPTech

Tiger, is there anyway you can modify this coding to fill in a specific range of cells, specifically B6-R225 instead of the single row?

Thanks.

I know this is an old thread, but very helpful! Tigeravatar, the code worked wonderfully for my sheet. The only thing that I would like to be able to do, is allow a user to customize how many codes are generated without going into the Developer tools to change the # of Dim arrUnqAlphaNums in the VB code?. Is this a possibility?