3 Phoenix, Inc.

Any device whose MAC address begins with 00:18:40 has a network interface built by 3 Phoenix, 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

00:18:40

Organization

3 Phoenix, Inc.

Address

14585 Avion Pkway Chantilly Virginia US 20151

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.