AO

Any device whose MAC address begins with D8:AF:81 has a network interface built by AO. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

D8:AF:81

Organization

AO

Address

Filippovskiy per., 8/1 Moscow RU 119019

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.