CARL ZEISS

Any device whose MAC address begins with 00:20:0D has a network interface built by CARL ZEISS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:0D

Organization

CARL ZEISS

Address

POSTFACH 1380 DE

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.