It seems some CAD software like AutoCAD support the conversion, or at least partial data translation of .ifc files (Industry Foundantion Classes) to IGES ASCII format (.iges, .igs). Probably something to do with BIM (Building Information Modeling) data.
Convert Industry Foundation Classes data to IGES 3D exchange format.
We have found 3 software records in our database eligible for .ifc to .igs file format conversion.
Microsoft Windows software - convert ifc to igs on Windows
Leading 2D and 3D CAD development software from Autodesk
Convert from ifc file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ifc to igs. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert ifc to igs on OS X
Mac version of popular Autodesk AutoCAD software
Multiplatform software - convert ifc to igs on any platform
An open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler