For tracking number check digit, is there a library of values by carrier or must I write specs for t

Hello Community,

When designing segmented tracking numbers in transportation management using P49005 and P490052, I need to add a check digit as the last segment of the tracking number.

Each carrier has a different algorithm for adding the check digit.  Is there a library of .dll’s by carrier we can use or must I write specs for each of the .dll’s?

Thank you for your time.