Change battle tag numbers

I want to change my battle tag numbers but I don’t know how. I tried looking it up but nothing I found actually showed how to do it. Everything I found just showed how to change the username not the numbers after the “#”. Is there a way to do it?

Sadly, there is no way to change the numbers of your BattleTag. A Game Master from the Customer Support team also confirmed this. Those numbers are randomly generated, and even they are not able to change them.