B.Braun Melsungen AG

Any device whose MAC address begins with 00:12:21 has a network interface built by B.Braun Melsungen AG. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:12:21

Organization

B.Braun Melsungen AG

Address

Schwarzenberger Weg 73-79 Melsungen Hessen DE 34212

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.