Entone, Inc.

Any device whose MAC address begins with 00:03:E6 has a network interface built by Entone, 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

00:03:E6

Organization

Entone, Inc.

Address

2755 Campus Dr Ste 235 San Mateo CA US 94403

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.