You can't list the vertices from within AC3D but It sounds like you should look at a .ac file. There, you will see all the vertices listed in order, then the surfaces with each surface referencing the vertices by number.
AC3D files are relatively simple - for more info see
http://www.ac3d.org/ac3d/man/ac3dfileformat.html
There's a bit at the end about getting your own data into AC3D files.