Gigabit Wireless

Any device whose MAC address begins with 00:03:77 has a network interface built by Gigabit Wireless. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:03:77

Organization

Gigabit Wireless

Address

3099 N. First Street San Jose CA US 95134

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.