is a legacy version (released over 14 years ago) that is no longer supported by Autodesk. The product key 001b1 corresponds to AutoCAD 2010 (the standard version, not any specialized vertical product like Civil 3D or Mechanical).
Product Key 001B1 is the official identifier for AutoCAD 2010 autocad 2010 activation code for product key 001b1
If you have a valid, legally purchased perpetual license, your only official recourse is to contact Autodesk directly. They can determine if manual activation is still possible for your specific account. 2. Upgrade to a Supported Version is a legacy version (released over 14 years