ESYSE GmbH Embedded Systems Engineering

Any device whose MAC address begins with 20:41:81 has a network interface built by ESYSE GmbH Embedded Systems Engineering. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

20:41:81

Organization

ESYSE GmbH Embedded Systems Engineering

Address

Ruth-Niehaus Str. 8 Meerbusch Nordrhein-Westfalen DE 40667

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.