What this means
The IEEE assigned the MA-L block 985FD3 to Microsoft Corporation. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 98:5F:D3, it is Microsoft Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 985FD3?
985FD3 is registered to Microsoft Corporation in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Microsoft Corporation's block covers 16,777,216 addresses.
What devices use 985FD3?
Any network device with a MAC address starting 98:5F:D3 was manufactured by or for Microsoft Corporation.