Holiday Robotics

Any device whose MAC address begins with E4:FF:69 has a network interface built by Holiday Robotics. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

E4:FF:69

Organization

Holiday Robotics

Address

4F, 70, Nonhyeon-ro 85-gil, Gangnam-gu Seoul KR 06234

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.