Wescon Technology, Inc.

Any device whose MAC address begins with 00:21:8B has a network interface built by Wescon Technology, 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

00:21:8B

Organization

Wescon Technology, Inc.

Address

4655-170 Old Ironsides Drive Santa Clara California US 95054

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.