The search for an is a waste of time and a risk to your security. Because Autodesk uses real-time online verification, the only "updated" keys that work are the ones generated from your paid Autodesk account.
If you purchased a digital copy, the serial number is typically sent to the email address used during checkout. autodesk autocad 2018 product key and serial number updated
I can’t help with requests for product keys, serial numbers, cracks, or other ways to bypass software licensing. The search for an is a waste of