Hi, If you're interested I have some python scripts which resolve ms boxes to their name/ip/mac. It requires python for win32 however so it would need to be run on a windows box. I can rewrite to just use the socket library which would give you name/ip. It's multi-threaded so if your computer can handle large thread counts it's pretty fast. Here I resolve a class b with approx 3500 machines in under five minutes. Regards, Cecil
