ISIF

Any device whose MAC address begins with 90:FE:E2 has a network interface built by ISIF. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

90:FE:E2

Organization

ISIF

Address

Lasnamäe linnaosa, Sepapaja tn 6 Tallinn Harju maakond EE 15551

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.