You should be able to access it by giving the ipv4 address of the host machine on the network... I do this when testing sites for responsiveness. So for example,
http://192.168.0.6:30320/name-of-the-app/folder/file.aspx
Should work on any device, mobile, tablet etc that is attached to your network... I say should because I haven't tried this on IIS, but it seems to work fine using php.
My advice would be, on the instance running your server, get onto terminal command prompt and get your ip-address... then do the above!