Method 1: If you still keep the box when you receive it, search then you will find the KSN.
Method 2: If not, click on screen menu button -- Settings -- tap menu again -- Device Info, then you will see "Serial Number".
You can find this sixteen digit code in the box your Kindle came in
or when you click on Settings and go to Device Info. Find your specific generation or type based on the first four characters.
The Serial Number is also shown on the Manage Your Kindle page of your Amazon account (in the Manage Your Devices section).
