Check whether a token is belong to `iPhone` or `Android`

I'm looking a way to check whether a token I get is belong to iPhone or Android in C#?

I found an information about that : difference between iOS, Android token

From my test that I did my Android token is 183 digits and iPhone is 64 digits, while the Android token start with the digits : 'APA..........."

Any ideas how to check it for 100% ?