KeRo Systems ApS

Any device whose MAC address begins with 00:12:3B has a network interface built by KeRo Systems ApS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:12:3B

Organization

KeRo Systems ApS

Address

Allikevej 3 Hørsholm DK 2970

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.