Alcatel-Lucent

Any device whose MAC address begins with 4C:5F:D2 has a network interface built by Alcatel-Lucent. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

4C:5F:D2

Organization

Alcatel-Lucent

Address

777 East Middlefield Road Mountain View CA US 94043

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.