How can I firewall Vietnam?

I'm getting sick and tired of Vietnamese fraudsters. They never get past our manual verification but it's really pissing me off having to refund orders every day. Most of the orders from Vietnam come in on the class A "203" but India, Australia Thailand and many other south-east asian countries also use 203.xxx.xxx.xxx.

Is there any way to get a hold of the IP classes assigned to Vietnam so we can firewall these scumbags?

 

 

 

 

Top