AO

Any device whose MAC address begins with DC:E3:05 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

DC:E3:05

Organization

AO

Address

Prospekt Mira Moscow RU 129223

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.