ZENNER

Any device whose MAC address begins with 04:B6:48 has a network interface built by ZENNER. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

04:B6:48

Organization

ZENNER

Address

Roemerstadt 6 Saarbruecken DE 66121

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.