If you are looking to install or reactivate this legacy version, here is the official stance from Autodesk:
If you have the software currently installed and activated on an old machine, it will continue to work. However, if that machine fails, the software cannot be officially "moved" to a new one because a new activation code is required. autocad 2009 serial number and activation code
The activation generators for 2009-era software have been decommissioned. Autodesk no longer provides activation codes for perpetual licenses for these versions. If you are looking to install or reactivate
AutoCAD 2009 was designed for Windows XP and Vista. It is not officially supported on Windows 10 or 11, and users often report frequent crashes or installation failures on these modern systems. Autodesk no longer provides activation codes for perpetual
Autodesk Community, Autodesk Forums, Autodesk Forumhttps://forums.autodesk.com need activation code for autocad 2009 - Forums, Autodesk