Serial System Ltd.

Any device whose MAC address begins with 00:06:20 has a network interface built by Serial System Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:06:20

Organization

Serial System Ltd.

Address

76 Playfair Road SG 367996

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.