Nordic ID Oy

Any device whose MAC address begins with 00:21:AD has a network interface built by Nordic ID Oy. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:AD

Organization

Nordic ID Oy

Address

Myllyojankatu 2A SALO FI FIN-24100

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.