Finding the Civil 3D version from a .DWG file
AutoCAD Civil 3D saves a version tag in the first few characters of .DWG files.
To find which version of Civil 3D was used to create a .DWG file,
Select the file in File Explorer
Right-click and select Open With > Notepad
If Notepad does not show up, you may have to select Choose another app and select Notepad from the Other options section of the popup.
The first few characters on the first line should appear as letters and numbers (e.g. AC1032). Use the below table to find which Civil 3D version this tag refers to.
| DWG Tag | Civil 3D version |
|---|---|
| MC0.0 | DWG Release 1.1 |
| AC1.2 | DWG Release 1.2 |
| AC1.4 | DWG Release 1.4 |
| AC1.50 | DWG Release 2.0 |
| AC2.10 | DWG Release 2.10 |
| AC1002 | DWG Release 2.5 |
| AC1003 | DWG Release 2.6 |
| AC1004 | DWG Release 9 |
| AC1006 | DWG Release 10 |
| AC1009 | DWG Release 11/12 (LT R1/R2) |
| AC1012 | DWG Release 13 (LT95) |
| AC1014 | DWG Release 14, 14.01 (LT97/LT98) |
| AC1015 | DWG AutoCAD 2000/2000i/2002 |
| AC1018 | DWG AutoCAD 2004/2005/2006 |
| AC1021 | DWG AutoCAD 2007/2008/2009 |
| AC1024 | DWG AutoCAD 2010/2011/2012 |
| AC1027 | DWG AutoCAD 2013/2014/2015/2016/2017 |
| AC1032 | DWG AutoCAD 2018/2019/2020/2021/2022/2023 |