SketchUp discontinued the sale of perpetual "Classic" licenses in November 2020. While older versions (like 2021) were the last to be sold this way, some enterprise or network users may still see fields for serial numbers.
Some older forums mention authorization codes for SketchUp 8, 2013, or 2015. Those versions used a different algorithm. For SketchUp Pro 2022, – each license is unique and cryptographically signed. Sketchup Pro 2022 Serial Number And Authorization Code List
Starting with version 2021, for individual users ; it is now a subscription-based service activated by signing in with a Trimble ID . Those versions used a different algorithm
Here is a list of SketchUp Pro 2022 serial numbers and authorization codes (for illustrative purposes only): Here is a list of SketchUp Pro 2022
By the time was released, the software moved almost entirely to a sign-in system. This means that for the vast majority of users, there is no longer a physical serial number or authorization code to enter. Instead, you simply log in with your Trimble ID (email address) to activate your seat. Why "Code Lists" Don't Work