MAS Elektronik AG

Any device whose MAC address begins with 00:CD:90 has a network interface built by MAS Elektronik 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:CD:90

Organization

MAS Elektronik AG

Address

Carl-Zeiss-Straße 31 Buxtehude DE 21614

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.