OOO RUBEZH NPO

Any device whose MAC address begins with 44:C3:9B has a network interface built by OOO RUBEZH NPO. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

44:C3:9B

Organization

OOO RUBEZH NPO

Address

Pionerskaya 11a Bratsk Irkutsk RU 665717

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.