LLC Proizvodstvennaya Kompania "TransService"

Any device whose MAC address begins with F4:E5:78 has a network interface built by LLC Proizvodstvennaya Kompania "TransService". This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

F4:E5:78

Organization

LLC Proizvodstvennaya Kompania "TransService"

Address

Ulitsa Podolskih Kursantov, build. 3, of. 133 Moscow Moscow RU 117545

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.