ALCATEL-LUCENT

Any device whose MAC address begins with 00:21:35 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

00:21:35

Organization

ALCATEL-LUCENT

Address

Ramirez de Prado 5 Madrid ES 28045

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.