Telencomm

Any device whose MAC address begins with 00:04:3E has a network interface built by Telencomm. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:04:3E

Organization

Telencomm

Address

2551 Walsh Avenue 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.