Zhone Technologies, Inc.

Any device whose MAC address begins with 40:F2:1C has a network interface built by Zhone Technologies, 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

40:F2:1C

Organization

Zhone Technologies, Inc.

Address

5700 Tennyson Parkway, Suite 400 Plano TX US 75024

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.