Product keys distinguish between software sold as standalone products versus those included in a larger suite. 001J1 AutoCAD Architecture 2018: 185J1 AutoCAD Civil 3D 2018: 237J1 AutoCAD Design Suite Premium 2018: 768J1
For those interested in exploring legitimate options, here are some AutoCAD 2018 64-bit product keys (note that these may have expired or changed): autocad 2018 64bit product key and hot xforce keygen 64 bitl