Microsoft MAC Address Prefixes

Microsoft blocks cover Hyper-V virtual machines, Surface devices and Xbox consoles.

IEEE blocks: 118
Registry names: Microsoft Corporation · Microsoft · Microsoft Corp. · MICROSOFT CORP.
MA-L (24-bit OUI): 118

What to know about Microsoft MACs

00:15:5D is the default range Hyper-V uses for dynamically assigned VM MACs. Azure VMs also present MACs from Microsoft ranges.
Windows 'Random hardware addresses' (a Wi-Fi setting) produces locally administered MACs, not Microsoft OUIs.

From the IEEE registry via the oui-data package (a mirror of the IEEE listings) (MA-L, MA-M, MA-S), built 2026-11-01.

MA-L (24-bit OUI): 118 blocks