And I used the 'Nmap' tool in the command prompt so I can see who is who, just to make sure I don't have any ninja's lurking about. All IP addresses looked good except one. I pasted the mac address in the website linked below to try and get some information yet all I got was an 'alert' message saying no record was found. I'm hoping this is the address for my other printer because I have no idea what else it could be. Should I be concerned?