WEBHow to Use The MAC Address Lookup Tool? Want to identify the device by its MAC address online? Enter the full MAC address or just the first 6 hexadecimal digits. Our MAC address finder supports most of the common formats such as 00-10-fa-c2-bf-d5, 00:10:fa:c2:bf:d5, 0010.fac2.bfd5, 00 10 fa c2 bf d5, or 0010fac2bfd5.