Solid Semecs bv.

Any device whose MAC address begins with D4:0B:B9 has a network interface built by Solid Semecs bv.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

D4:0B:B9

Organization

Solid Semecs bv.

Address

Oostwijk 18 Uden Noord Brabant NL 5406 XT

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.