UserGate Ltd.

Any device whose MAC address begins with 34:91:6F has a network interface built by UserGate Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

34:91:6F

Organization

UserGate Ltd.

Address

Nikolaeva str., 11, 602 Novosibirsk RU 630090

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.