T3PLUS NETWORKING, INC.

Any device whose MAC address begins with 00:20:89 has a network interface built by T3PLUS NETWORKING, INC.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:89

Organization

T3PLUS NETWORKING, INC.

Address

2840 SAN TOMAS EXPRESSWAY SANTA CLARA CA US 95051

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.