Find out which serial is which key

In the Zoo, we enter the RH60… licenses.
In the list, they appear as 6-16xx…

A customer has a lot of licenses, and wants to delete some with certain RH60 keys in the Zoo.
How can we find out which RH60 is a 6-16xx?

Thank you.

They can look them up themselves a couple of ways.
If they still have the email invoices, the serial number and corresponding license keys are both listed.
If those aren’t handy, there’s a tool on the Support page, “What is my Rhino 5 or 6 license key”. It asks for the serial number and emails the license key.

Thank you John.