hmmmm… doesn’t <b>arp -a</b> give you the information? If you don’t get the mac address then it is not local to your subnet and that is more challenging. Try <a href=”http://www.angryziber.com/w/Home”>Angry IP scanner</a>. It sometimes gets remote MAC addresses. Another tool can be found <a href=”http://www.youngzsoft.net/cc-get-mac-address/”>here</a>.