Full Spectrum Inc.

Any device whose MAC address begins with 00:21:EE has a network interface built by Full Spectrum 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:EE

Organization

Full Spectrum Inc.

Address

1149 Chestnut Street, Suite 100 Menlo Park California US 94025

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.